If you want to get some kick-ass core muscles on your stomach, the muscles under the 6 pack, I do a really good excercise that has given me great results and a flat stomach. It seems all the 6-pack developement in the world doesn't do much for actually flattening it.
Anywhoo, just lay on your back and put your legs together. Hover them a couple inches above the ground, and lift them way up, then way down, never touching the ground. This will probably kill your muscles if it's your first time, so you might want to start out lifting one leg at a time. Believe me, the first time I did this I went gung-ho and the next morning I couldn't sit up from bed lol.

Also, I found a really good one to excercise those muscles that attach your neck to your shoulders (forget what they're called). It works your shoulders and triceps somewhat too. Just grap a couple weights in each hand, stand with them at your sides, and lift them up toward your armpits and lower them down again. Do it very slowly, or it won't work nearly as well as it should.

For arms, pecs, triceps, back, and shoulders, I have two types of pushup sets. One where I have my arms fairly wide apart, and another where I put my hands together to make a triangle with my fingers. If you do both you can cover all the muscle groups pretty well. (yeah I know you asked for no pushup advice, but what can you do? You could come after me, but I'd *insert austrian accent* CRUSH YOU WITH MY SHINY MUSCLES)

Peace:jointsmile: