As I mentioned in the first post, they were offered by a gent at TweakCG.com for use in sculpting practice. However, if you want to practice rig creation with them or UV mapping, I guess that's okay, as long as it's practice. That's not to say you can't sculpt something and then use your programs polygon tools to build a low res mesh of your high-res sculpt for commercial purposes though. Just make sure you're not using the base mesh Arshlevon provided us, as I'm still hazy on if he allowed commercial use or not (I know he said practice though for sure). Better safe than sorry.