Sure having more equipment would be nice, but you'll be fine with what you got im sure. Youve come up with alot of exercises.
For calvs, you could find some steps, or an incline and do dumbell calv raises. also if you do lunges, when you come down on your foot keep it on your toes to work your calvs more.
Hamstrings, sure leg extension is probably what you want here. But your getting plenty of hamstring exercise from squats, lunges and your stiff legged deadlifts.
Abs, I know you said all you have acess too, but I highly recommend getting ahold of one of those exercise balls. Not only are crunchs more effective on the balls, but you can also add in leg lifts with the ball to target lower abs. You can even do stabalizing push ups, and a ton of other exercises abs and more.
if not you can just do the classic sit up, or the classic crunch.
<message edited by Nm0ney34 on Wednesday, November 29, 2006 7:37 AM>