Mmmm. Very nice textures.
They would be perfect for this mod.
JPEG is intended for web pages and examples of the actual pictures, never for actually working from.
As you have used Gimp, you will however be able to switch off chroma subsampling and enable floating-point calculation.
Even with these settings and 100% quality, JPEG is not ideal.
A RAR file with BMPs, or compress as PNGs would be nice please
If storage is an issue, I can host them, or you can join my site and get 2GB of your own storage to use as you please.
Making texture-packs is easy, once you have imported your first texture. If you can't find a tutorial here, check the old tutorials at www.oldunreal.com
UEd for Unreal 227 and UT2K4 have useful features that make the job easier (if you have either of them, use them).