I've been completely irritated whenever I test mods out because i can only choose the first four once....if only there were a place on the heli1 map (the very first map in game, where you fight scorpion) If only there were a place i could change out my team i could test out all my addon's without having to start over again and again.
here it is

Be sure to make a backup of the original heli1.engb in case you don't like it or can't get it running, syntax is very important to the engb's. I would be wary of doing this unless you are familiar with decompiling, and recompiling files in mua.
HERE is a link to my file
http://www.mediafire.com/?44j1uh14uewjr9kthere are two things here, "entinst" i'm not totally sure what this stands for, but i placed that section in same area of heli1engb as other "entinst"'s
entinst {
type = xtraction_point ;
inst {
name = xtraction_point ;
pos = -1880.12 -187.904 -117.522 ;
}
}
=================================
this second part i call the "entity" I placed this part in same area as other "entities"
entity {
actleader = true ;
actmatchteam = true ;
actonuse = true ;
actscript = common/extraction/exp_activate ;
actsound = common/game/xtraction ;
acttogglesanim = true ;
acttogglesloopfx = true ;
animstarton = false ;
classname = gameent ;
description = S.H.I.E.L.D. Access Point ;
extent = -30 -30 0 30 30 60 ;
fxlevel = 1 ;
ignoretelekinesis = true ;
loopfx = base/misc/extraction_loop ;
loopfxstarton = false ;
model = common/extraction_point ;
name = xtraction_point ;
nogravity = true ;
nopickup = true ;
nopush = true ;
quickuse = true ;
resetstate = true ;
spawnscript = common/extraction/exp_spawn ;
team = hero ;
}
These go into the heli1.engb nothing else needs to be done. Now when you start game you will be able to change characters right at the git-go.