changing game mode through GSC

do you guys know what command will change a match into "team-based" after the mod changes the session to "xblive_privatematch 0"...?

i ask this because once my mod changes the private match into a public match, it throws the host into "limbo" where it seems the game thinks it is free-for-all when it is actually a team-based match... this means that the player automatically joins what amounts to spectator mode since the game doesn't understand the current mode is team-based

it seems the default game mode when changing to a public match is free-for-all... i saw in a decompiled playlists.info file where you choose modes in matchmaking had various codes such as:

"teambased" (general term used for all team based modes?)
"script war" (script initiated when you pick team deathmatch?)
"script koth" (script initiated when you pick headquarters?)

i know that the console command "fast_restart" can be put into a GSC file when expressed in this format: "map_restart(true);" so i'm thinking something similar can be done with the commands found in the decompiled playlist.info (a branch of mp_playlists.ff)

....

also on a side note i've been looking into various ff (fast file) editors in order to modify a PC version mp_playlists.ff file but every editor i can find rather doesn't support PC version fast files or it can't open playlist files... any help regarding this? any info at all would help