These are some juicy functions. However, they're not referenced anywere within "Homeworld2.big". Rather, they are referenced within "Homeworld2.exe" itself. Therefore, I don't think that they are accessible to modders.

SetGameOption
SetGameType
SetPlayerReady
SetPlayerRaceID
SetPlayerName
SetPlayerColour
SetPlayerTeam
SetPlayerToAI
SetPlayerToHuman
GetPlayerCount
GetPlayerLocalIndex
SetRecordedGame
SetCampaignLoad
SetCampaignLevelIndex
SetCampaignLevel
SetSkirmishLoad
SetSkirmishLevel
GetMPScenarioName
GetMPScenarioCount