projection matrix mod or help?

Hi all

I am making a small flash-like app for simple 2D keyframing.

I want to make a limb and attach it to another but offset, and make the char walk etc.

To start with I would like to for instance define a shape unrotated, unscaled etc and be able to extract the 2d coordinates of that point after rotating or such...

I suggest you read a good book or tutorial about tranformation matrices, as there are quite a bit of mathematics involved.
If you get stuck at a specific point you can allways ask for help here.