I went from 268 to 241 in exactly four weeks a couple of years ago- the only shit I took was ECA. I didn't do it the smartest way possible, so I probably sacrificed a little muscle, but not as much as you would think.
One day I got some film developed, and when I looked at the pictures I realized just how chubby I had gotten over the winter. I could barely see my eyes when I was smiling. The next day I started dieting. I ate five meals a day, consisting of only rice, egg whites, tuna, chicken breast, and protein shakes. I popped ECA like it was candy. I'd have a couple of doses by my bed so I could pop them before I got up. Then I'd go to the park and jog the trail for 45 minutes to an hour on an empty stomach, have a protein shake, then hit the gym. If I had access to a digital camera I'd post the pictures.
Anyway, the point is that you've just got to be dedicated, and you can do a lot with what you've got. Shit, look at some of the guys that come out of a military eight week basic training course. Some come out looking ten times better than when they went in- maybe not up to par for bodybuilding, but damn good considering they're power- eating three meals a day and just running and doing calisthenics. They just have to work their asses off, so their bodies change.