Did... you guys really just learn about the phillipk textures now?
No offense to anybody, but they have been in other flavors of Cube 2 (e.g. Sauerbraten, as mentioned, along with Sandbox and some others) for quite a while now. They're pretty complete, though - you've got your wall trims, your ceilings and floors, walls, grates, light textures - the complete package. I vote to include them (if anyone's counting).
(this feels very backwards - RE is probably the community that's doing the most moving forward of the communities I know, and yet hadn't noticed these. Huh.)
If there's any need for more textures, this guy (
http://agf81.deviantart.com/) releases textures (seamless and unmodified) under a cc-by-3.0
license. I also found these -
http://opengameart.org/content/huge-2048-tileable-textures-pack - but I'm unsure if they're already used in RE or not (considering the relationship between FGD and OGA).