i read that if ur not on steriods (im not) u should only work out for half an hour cause ur muscles get too tired after that. but i cant seem to do this because i need quite a while to rest 3-4 mins after my strenth 6-8 reps and it takes me about 2 hours to do sets. also i do super sets chest-back days triceps-biceps days and so on is this the best way?

Depends on what your aim is. For bodybuilding wether you are natural or not should make nooo difference at all!
Anywhere from 40-60mins will suffice. I DO take steroids and 2hrs is too long, even for me or other guys that are on.
If you need 3-4mins rest then i would concentate on getting fit also as this is what seems to be the problem. I dont know anyone who trains for 2hrs.
If you are natural then you shouldnt be training for 2hrs, unless it is a fitness program for brat camp!
Get in the gym, no chit chat and get home for your post workout meal, simple. Your body will take days to recover on your program.
I will be adding a sample diet and beginners program for all to read. I'll try and post tomorrow.
Dont worry, help is at hand  ;D

ok mate thanks ill try getting fitter

i wont train longer than an 1 hour

yep, hour for me too, might do 20 mins on a bike after sometimes.... 2 hours sounds painful!!!