^ If you're going to take any of the advice in this thread, listen to him.
Failing that, post the question on a strength training forum where they know what they're talking about. Half the answers in this thread make me want to cry.
P90X is a marketing fad. There's more efficient ways to train.
If you hate the ghetto wannabe bad-asses in your gym, go first thing in the morning. I train at 7am and I'm one of the only people in there.
Went from being 210lbs at ~5'9, virtually no muscle to ~170lbs, benching ~220lbs, squatting 310lbs and deadlifting ~415lbs.. It's one of the best things I've done for myself.
I wasted about 2 years before training properly doing random crap much alike most the advice given in this thread, but it wasn't until I started doing stronglifts 5x5 (similar to starting strength) and subsequently madcow that I begun making good progress. If you want to train then do it properly, rather than spinning your wheels in search of a "burn" or "Insanity Crazy Max Fat Burning Level".
If you want to lose a bit of weight, then increase the protein in your diet, cut the cals a bit and do strength training, maybe throw in a day or two's cardio.
You won't become a huge ripped guy either, especially not overnight, it takes tons of hard work. Efficient strength training is the quickest way to get to whatever your goal may be from a relatively untrained position. Whether that's losing a bit of fat, or gaining muscle mass.