[SickAttack]

There are literally 2 ways:

1. All modes in gamemode, maps as filterscripts or in the gamemode if you want.

pawn Code:

switch(mode)
{
    case MODE_1:
    {
        // stuff
    }
    // others
}

where needed.

2. Modes and maps as filterscripts, unload fs of previous mode & map, load fs of new mode & map.

It isn't that hard. I'd prefer the 1st way btw, go with anyone though, I don't really care.