Just wanted to get some feed back, I'm working in GIMP so I've been reading over text for photoshop and searching out the correct methods in GIMP. Anyways: I've cleaned up the texture jpg a little bit since the screenshot but that's about it. Used a mixture of decals and texture work from CGTextures.com. Any feed-back…
Just based on what i see here (i know you have cleared you textures up a bit but) make sure you textures don't have to much detail and character to them otherwise they run the risk of repeating visually. In udk you can use vertex painting and decals to break up tiling areas. That and zonal/generic lighting.
A good method for adding variety to a surface using a tiled texture is to add some decals on top. For example if you took your base wall texture and removed some of the tiling grunge on it. Get that tiling perfectly so there are no seams. Then from there you can add another layer of geometry that is adding unique details…