i have factory fog light wires ran and i was curious if anyone has ever rigged up some hella 500s or something of that sort to the foglight wires instead of using the stock headlights or if it could be done, im not sure if the wattage is too much, anyone help me out?

if the wires are for fog lights, assuming that you do not have them, then that should be fine to wire hellas to the stock fog light wires. Do you have a fog light switch in the car? my buddys 95 pathfinder dosen't have factory lights or a switch, to the best of my knowledge. it wouldn't be hard to rig one.
If you have fog lights and want to additionaly run hellas off of them then you might run into wattage problems.
hope that helps.