Hi,
I've been playing OpenArena for a couple weeks now and I must say I'm a little dissapointed with the aesthetic quality of a lot of the maps that are included in 0.7. Most of the maps really don't do justice to the q3 engine and its capabilities. I want to help change that

I have a decent amount of experience with gtkradiant and the q3 engine. You can see some of my work
here. However, I was wondering what licenses are acceptable for inclusion in the game. As far as I know, the GPL only covers code, not media (I may be wrong about this). There are a few texture packs out there that I want to use that are not strictly under the GPL and I'm interested in knowing if their licenses are acceptable. Mostly they're different variations of CreativeCommons.
Sock's Techno pack which falls under
this licenseEvillair's textures which fall under
this licenseHourences' pitores pack which is "free for all non commercial use as long as you credit me", but you can also purchase a commercial license.
Also, I'm working on a set of my own custom textures based on photo references from sources that have agreed that I use
this license.
So, I guess my question is: is there any problem with using any of these textures for OpenArena?