Alright, I just had to say something about this.
The only features that make APS superior to GIMP are those, related to working towards print and the brush-engine. On all other domains GIMP is equally powerfull or even better. Many APS features, like the automated image-area-removal (dunno how the call it), may appear amazing at first, but they're just gimmicks, to catch nubs.
Wally is really not made for serious texture/skin creation.
Get
GIMP!