Vars in the config files that you can edit to your liking.

File is located C:\Program Files (x86)\Steam\steamapps\common\Full-On Paintball\UDKGame\Config folder is the UDKGame.ini.

[Paintball.PBPawn]
bPronedSetsAccuracy=true ;DOES THS BUTTON WHEN PRESSED AFFECT ACCURACY OF THE GUN
bCrouchSetsAccuracy=true ;DOES THS BUTTON WHEN PRESSED AFFECT ACCURACY OF THE GUN
bWalkSetsAccuracy=true ;DOES THS BUTTON WHEN PRESSED AFFECT ACCURACY OF THE GUN

[Paintball.PBPlayerController]
bShowOutBoundsArt=true ; if you do not want to see zones make it false.
bShowTriggerVolumes=true ; if you do not want to see zones make it false.
bNoCrosshair=False ; if you do not want to see crosshairs make it true.
bSimpleCrosshair=False ; if you want to see a simple crosshair make it true.
WeaponHandPreference=HAND_Right ;if you want left handed put this in HAND_Left


also in C:\Program Files (x86)\Steam\steamapps\common\Full-On Paintball\UDKGame\Config folder is UDKWeapon.ini

[Paintball.PBWeapon]
GrenadeHoldUntilReleased=true ; throw grenade at button push make this false
CrosshairColor=(R=255,G=255,B=255,A=255) ;sets crosshair color
UsingOldTrigger=true; use the same trigger from when you died, false sets it stock(semi auto)

key board buttons for weapons are
M, SwitchFireMode, Select triggers
R, ReloadWeapon
P, PickupWeapon
N, ChangeBattery
O, ReloadCo2
L, StartStopGrenadeLauncher