Help/How to animate imported images in AS3 please

Question: How do I (assuming it is possible) animate a drawing (gif, jpeg, png, whatever) I drew outside of flash. I have some monsters I have drawn and would like to animate them for a flash game I am creating. I’ve looked around and done a lot of searches, but I cannot find any answers or tutorials. It is probably because I am not using the right keywords.

One similar to this that already has a lot of detail, but can still have the limbs animated with the bone tool or weapons even. When I try it seems I have the entire square image and can’t use the weapon shape.

Note: I am new to flash and have only gone through the first 14 tutorials on this site, which rocks btw! Thank you so much for taking the time to create and post these tutorials.

Also: I started learning flash with the goal of creating a simple block puzzle game for my phone, but have not found any good tutorials for that yet. Separate topic, but help is appreciated there as well.

Links or answers appreciated. Thanks in advance!