Added freon but it didn't help!

Hello there! I think this is my first time posting a question but I use this forum for everything. Friend has a problem with the car, go to automotiveforums.com! I love this place! Anyway, problem is this....
1995 Nissan Quest blows hot air out of the a/c. I've searched and haven't found quite the same problem. The compressor works, the freon was a tad low so I added some. After I added the freon, it registered high but I unattached and reattached the nossle and it showed that it was in the normal range. (Just added that because it may be important) So, now it's just blowing regular air, not hot but not cool either. Would you guys mind giving me the steps to take in checking out other possibilities? Is it hard to trace all the hoses? Do you know where I can find the layout without having to pay out? :o) Any other suggestions? Thanks for your time, Cassie

does the rear a/c work? if it does, go to http://www.automotiveforums.com/vbulletin/t434805.html
the answer is in there

Ok, thanks, I read that and I'll keep it in mind. The rear ac doesn't make any noise at all. Doesn't blow air either. The light comes on and that's it.