The textures you can extract by setting the texture view to 100 percent and hitting print-screen then pasting in a paint program and resaving - itís sort of a hack way of doing it but it works.
The models you can reconstruct vertex by vertex since you can see the wire-frame and how the model was constructed. If youíve any will to do this itís great practice, just use one of the appropriate sized UT models as a base of reference.
Then you just have to line up the UVs to match the texture.
Technically it is illegal though, if you're using them in another game - whether or not anyone cares is another story.
/Edit - Eh, actually you can simply right click>export to file, then add a .bmp or .tga to export texture files. Not sure why I thought that wouldn't work considering I'd done it before