I have a 92 SC2 DOHC. my car is in dire need of a tune up. i was wondering if anyone could tell me if it would make too big a difference to do that lil at a time or all at once. id rather do everything all at the same time. but unfortunatly i dont have that kinda time or money. so if i do lil at a time is it gonna hurt anything? thanx

start with the plugs.. there about $2 each then move to the spark plug wires.. they're about $30.
You could stop there if your o2 sensors are working fine.

when changing the plugs and wires on this model is there also a distributer cap to change?

also when chang plugs/wires and distributor if present, whats reccemended to change or at least inspect at the same time? thanx

no there isn't a distributor cap or rotar.. there is a coil that is switched electronically by the crank sensor.

You probably should clean the throttle body and change the pvc valve (get the one from saturn along with the cleaner) and air filter.
Then you are probably done.

cheapo tune up-
replace spark plugs $5-10
replace PCV valve(AC Delco only)$5
clean throttle body

check and replace if needed:
wires
air filter
fuel filter
belt
hoses
coolant

it isn't a great way of doing things, but it works if you are in a jam.