erm.
*me hunts for gp4 tweaker on desktop*
*me calls for a search and rescue hellocopter*
*they found it and its safe
*
ok, im using gp4 tweaker version 1.0.4.2 and its the first option in the list.
under flag options, change it from original to either drive thru (makes you have to do a drive thru penalty in a few laps)
if u want it totally disabled then put it to custom, and go thru the list next to it, then next to that untick the tick box thing. (is it ment to have a label coz it doesnt show here
)
then hit apply and run gp4