Help with making an icon

[myrroddin]

Attached is a great picture of an aardvark, which I would like to use as an icon for an AddOn. However, I don't know how to use GIMP all that well, and don't own Photoshop.

What I'd like is no background, just the cute animal, in .tga format please and thank you.

The icon will (hopefully) be displayed in Broker panels, as a mini map icon, and also possibly in the settings of the AddOn. I don't know if that matters, or if multiple icon sizes need to be created. The last time I looked at WoW icon sizes they had to be 64x64 but I don't even know if that's true today. I do know the attached image doesn't conform to those measurements, and I am perfectly happy with height and width not being equal, so long as all the fuzzy adorable critter is there, and if WoW supports 512x1024 or whatever.

Yep, I really don't know anything!

If anyone is up to the task, I'd be grateful, thank you.