what are the extra buttons on my super bitchar-g controller for? how can i make them do stuff

rofl when i press them the led on the controller flashes... my eyes gleam with potential remote control mayhem.
my picks for what they SHOULD do:
1.) handbrake turn?
2.) nitrous boosters!
3.) drop oil slick (or bits of slippery paper)
4.) jack suspension up and down (so complicated ; just the thing for a bit pimp)
5.) lights on and off (i need a kit)
6.) half-power (for turns)
7.) leet siren! (w00t w00t w00t w00t w00t)