Shawn (04Redline) put together a great guide a few years back.
http://www.redlineforums.com/forums/...ve-tuning.html
If you are unfamiliar with fuel injection, I did a very basic run down, and application to HPT a few years ago as well.
http://www.redlineforums.com/forums/...lots-pics.html
Other than that, there are a few books floating around. Greg Banish has a great HPT guide. It focuses mainly on LSX motors, but it's still very informative.
With respect to grabbing a GM Stage 2 tune, and copying the values. I usually don't recommend this, for the reason that GM modified a lot of tables in that tune that we don't have access to. While you can copy over the MAF, VE and timing... you won't get the full effect of the tune.