Uhhhhhhhhhhh....Can't help ya there...
But, I can offer a suggestion. In your Car-Bomb script, enter this command, somewhere in there, "timergo = true".
Go into your Mission Editor, make a Trigger, and in the Conditions Field enter "timergo". In the activations, enter "[] exec "somescript.sqs" ". Set the X Axis to 0, and the Y Axis to 0, and your set. Make your "somescript.sqs" in the mission directory, and add whatever commands and or / parameters you want.
Basically what your doing is when the script is fired, it activates the trigger, with your option to enter the parameters, instead of hassling with a "[Object, parameter, ice-cream, Kung-Fo cop, Old-man, Crack, Crack-With-Old-Man] this addaction ["Eat Drink", "eatdrink.sqs"]" type command.
I hope you can under-stand me, if not, just post a reply saying that you don't under-stand a word I-''m ty-pi-ng-. An-y I-D-ea-?
So, just in case you don't catch my drift, and to make a long post longer:
1. You hit the action. "gotimer" is activated.
2. Gotimer attached to a trigger which, in it's Activation Field, is "[Amountoftime, Car] exec "somescript.sqs".
3. Wait....
4. BOOM!
Heh, course, that's just 2nd Year Old Talk......
Once again I hoped it helped, if there's any questions contact me, or reply to my post...Errr...Course I think I covered it...Ya know what, why don't I go out and make an example mission right now? Actually, why don't I go to sle- (Falls asleep on keyboard).
-RunAwayScientist