diff --git a/src/ai/ai_config.cpp b/src/ai/ai_config.cpp
--- a/src/ai/ai_config.cpp
+++ b/src/ai/ai_config.cpp
@@ -14,87 +14,28 @@
 #include "../core/random_func.hpp"
 #include "ai.hpp"
 #include "ai_config.hpp"
-
-void AIConfig::ChangeAI(const char *name, int version, bool force_exact_match, bool is_random_ai)
-{
-	free(this->name);
-	this->name = (name == NULL) ? NULL : strdup(name);
-	this->info = (name == NULL) ? NULL : AI::FindInfo(this->name, version, force_exact_match);
-	this->version = (info == NULL) ? -1 : info->GetVersion();
-	this->is_random_ai = is_random_ai;
-	if (this->config_list != NULL) delete this->config_list;
-	this->config_list = (info == NULL) ? NULL : new AIConfigItemList();
-	if (this->config_list != NULL) this->config_list->push_back(_start_date_config);
-
-	/* The special casing for start_date is here to ensure that the
-	 *  start_date setting won't change even if you chose another AI. */
-	int start_date = this->GetSetting("start_date");
-
-	for (SettingValueList::iterator it = this->settings.begin(); it != this->settings.end(); it++) {
-		free((*it).first);
-	}
-	this->settings.clear();
-
-	this->SetSetting("start_date", start_date);
-
-	if (_game_mode == GM_NORMAL && this->info != NULL) {
-		/* If we're in an existing game and the AI is changed, set all settings
-		 *  for the AI that have the random flag to a random value. */
-		for (AIConfigItemList::const_iterator it = this->info->GetConfigList()->begin(); it != this->info->GetConfigList()->end(); it++) {
-			if ((*it).flags & AICONFIG_RANDOM) {
-				this->SetSetting((*it).name, InteractiveRandomRange((*it).max_value - (*it).min_value) + (*it).min_value);
-			}
-		}
-		this->AddRandomDeviation();
-	}
-}
+#include "ai_info.hpp"
 
-AIConfig::AIConfig(const AIConfig *config)
-{
-	this->name = (config->name == NULL) ? NULL : strdup(config->name);
-	this->info = config->info;
-	this->version = config->version;
-	this->config_list = NULL;
-	this->is_random_ai = config->is_random_ai;
-
-	for (SettingValueList::const_iterator it = config->settings.begin(); it != config->settings.end(); it++) {
-		this->settings[strdup((*it).first)] = (*it).second;
-	}
-	this->AddRandomDeviation();
-}
-
-AIConfig::~AIConfig()
-{
-	free(this->name);
-	this->ResetSettings();
-	if (this->config_list != NULL) delete this->config_list;
-}
+/** Configuration for AI start date, every AI has this setting. */
+ScriptConfigItem _start_date_config = {
+	"start_date",
+	"Number of days to start this AI after the previous one (give or take)",
+	AI::START_NEXT_MIN,
+	AI::START_NEXT_MAX,
+	AI::START_NEXT_MEDIUM,
+	AI::START_NEXT_EASY,
+	AI::START_NEXT_MEDIUM,
+	AI::START_NEXT_HARD,
+	AI::START_NEXT_DEVIATION,
+	30,
+	SCRIPTCONFIG_NONE,
+	NULL
+};
 
-AIInfo *AIConfig::GetInfo() const
-{
-	return this->info;
-}
-
-bool AIConfig::ResetInfo(bool force_exact_match)
-{
-	this->info = AI::FindInfo(this->name, force_exact_match ? this->version : -1, force_exact_match);
-	return this->info != NULL;
-}
-
-const AIConfigItemList *AIConfig::GetConfigList()
-{
-	if (this->info != NULL) return this->info->GetConfigList();
-	if (this->config_list == NULL) {
-		this->config_list = new AIConfigItemList();
-		this->config_list->push_back(_start_date_config);
-	}
-	return this->config_list;
-}
-
-AIConfig *AIConfig::GetConfig(CompanyID company, AISettingSource source)
+/* static */ AIConfig *AIConfig::GetConfig(CompanyID company, ScriptSettingSource source)
 {
 	AIConfig **config;
-	if (source == AISS_FORCE_NEWGAME || (source == AISS_DEFAULT && _game_mode == GM_MENU)) {
+	if (source == SSS_FORCE_NEWGAME || (source == SSS_DEFAULT && _game_mode == GM_MENU)) {
 		config = &_settings_newgame.ai_config[company];
 	} else {
 		config = &_settings_game.ai_config[company];
@@ -103,12 +44,43 @@ AIConfig *AIConfig::GetConfig(CompanyID 
 	return *config;
 }
 
+class AIInfo *AIConfig::GetInfo() const
+{
+	return static_cast<class AIInfo *>(ScriptConfig::GetInfo());
+}
+
+ScriptInfo *AIConfig::FindInfo(const char *name, int version, bool force_exact_match)
+{
+	return static_cast<ScriptInfo *>(AI::FindInfo(name, version, force_exact_match));
+}
+
+bool AIConfig::ResetInfo(bool force_exact_match)
+{
+	this->info = (ScriptInfo *)AI::FindInfo(this->name, force_exact_match ? this->version : -1, force_exact_match);
+	return this->info != NULL;
+}
+
+void AIConfig::PushExtraConfigList()
+{
+	this->config_list->push_back(_start_date_config);
+}
+
+void AIConfig::ClearConfigList()
+{
+	/* The special casing for start_date is here to ensure that the
+	 *  start_date setting won't change even if you chose another Script. */
+	int start_date = this->GetSetting("start_date");
+
+	ScriptConfig::ClearConfigList();
+
+	this->SetSetting("start_date", start_date);
+}
+
 int AIConfig::GetSetting(const char *name) const
 {
-	SettingValueList::const_iterator it = this->settings.find(name);
-	/* Return the default value if the setting is not set, or if we are in a not-custom difficult level */
-	if (it == this->settings.end() || GetGameSettings().difficulty.diff_level != 3) {
-		if (this->info == NULL) {
+	if (this->info == NULL) {
+		SettingValueList::const_iterator it = this->settings.find(name);
+		if (it == this->settings.end() || GetGameSettings().difficulty.diff_level != 3) {
 			assert(strcmp("start_date", name) == 0);
 			switch (GetGameSettings().difficulty.diff_level) {
 				case 0: return AI::START_NEXT_EASY;
@@ -118,115 +90,28 @@ int AIConfig::GetSetting(const char *nam
 				default: NOT_REACHED();
 			}
 		}
-		return this->info->GetSettingDefaultValue(name);
+
+		return (*it).second;
 	}
-	return (*it).second;
+
+	return ScriptConfig::GetSetting(name);
 }
 
 void AIConfig::SetSetting(const char *name, int value)
 {
-	/* You can only set ai specific settings if an AI is selected. */
-	if (this->info == NULL && strcmp("start_date", name) != 0) return;
-
-	if (this->info == NULL && strcmp("start_date", name) == 0) {
+	if (this->info == NULL) {
+		if (strcmp("start_date", name) != 0) return;
 		value = Clamp(value, AI::START_NEXT_MIN, AI::START_NEXT_MAX);
-	} else {
-		const AIConfigItem *config_item = this->info->GetConfigItem(name);
-		if (config_item == NULL) return;
 
-		value = Clamp(value, config_item->min_value, config_item->max_value);
+		SettingValueList::iterator it = this->settings.find(name);
+		if (it != this->settings.end()) {
+			(*it).second = value;
+		} else {
+			this->settings[strdup(name)] = value;
+		}
+
+		return;
 	}
 
-	SettingValueList::iterator it = this->settings.find(name);
-	if (it != this->settings.end()) {
-		(*it).second = value;
-	} else {
-		this->settings[strdup(name)] = value;
-	}
-}
-
-void AIConfig::ResetSettings()
-{
-	for (SettingValueList::iterator it = this->settings.begin(); it != this->settings.end(); it++) {
-		free((*it).first);
-	}
-	this->settings.clear();
-}
-
-void AIConfig::AddRandomDeviation()
-{
-	for (AIConfigItemList::const_iterator it = this->GetConfigList()->begin(); it != this->GetConfigList()->end(); it++) {
-		if ((*it).random_deviation != 0) {
-			this->SetSetting((*it).name, InteractiveRandomRange((*it).random_deviation * 2) - (*it).random_deviation + this->GetSetting((*it).name));
-		}
-	}
-}
-
-bool AIConfig::HasAI() const
-{
-	return this->info != NULL;
-}
-
-bool AIConfig::IsRandomAI() const
-{
-	return this->is_random_ai;
-}
-
-const char *AIConfig::GetName() const
-{
-	return this->name;
-}
-
-int AIConfig::GetVersion() const
-{
-	return this->version;
+	ScriptConfig::SetSetting(name, value);
 }
-
-void AIConfig::StringToSettings(const char *value)
-{
-	char *value_copy = strdup(value);
-	char *s = value_copy;
-
-	while (s != NULL) {
-		/* Analyze the string ('name=value,name=value\0') */
-		char *item_name = s;
-		s = strchr(s, '=');
-		if (s == NULL) break;
-		if (*s == '\0') break;
-		*s = '\0';
-		s++;
-
-		char *item_value = s;
-		s = strchr(s, ',');
-		if (s != NULL) {
-			*s = '\0';
-			s++;
-		}
-
-		this->SetSetting(item_name, atoi(item_value));
-	}
-	free(value_copy);
-}
-
-void AIConfig::SettingsToString(char *string, size_t size) const
-{
-	string[0] = '\0';
-	for (SettingValueList::const_iterator it = this->settings.begin(); it != this->settings.end(); it++) {
-		char no[10];
-		snprintf(no, sizeof(no), "%d", (*it).second);
-
-		/* Check if the string would fit in the destination */
-		size_t needed_size = strlen((*it).first) + 1 + strlen(no) + 1;
-		/* If it doesn't fit, skip the next settings */
-		if (size <= needed_size) break;
-		size -= needed_size;
-
-		strcat(string, (*it).first);
-		strcat(string, "=");
-		strcat(string, no);
-		strcat(string, ",");
-	}
-	/* Remove the last ',', but only if at least one setting was saved. */
-	size_t len = strlen(string);
-	if (len > 0) string[len - 1] = '\0';
-}