i was just requiring some help. i am running 0 guage wire to my 2200rms mono amp and was looking at putting a better earth in as it will be o guage. can u just run more wires from the battery terminal to the chassis for earths of coarse. i have been told that it can interfere with computer of car [size=7]please help me!!!

for 2200 rms, I would use at least 2 runs of 0ga for each of positive and negative.

you may find using the car's body as an earth is insufficient for that power.
if you dn't want to run a complete cable for the earth, there is no benefit to more than one 0ga from the battery to the chassis. but you may want to increase the earths for the engine.

search for earthing on this site for lots of info about earthing.

i have just yanked out all 4 guage wiring and wanted to run a few leads from chassis in motor bay to battery

There's an earthing tutorial in the Tutorials forum, go have a look in there.