To make a long story short, my hard drive crashed a while back, therefore I had to reinstall everything. However I reinstalled the CoD Radiant program just last night, and it wouldn't show anything from CoD UO. The first time I downloaded it, I couldn't unzip it because the file was damaged some how, but when I downloaded with Internet Explorer (I normally use Firefox), then it worked.

So I have the editor up and running, but it just shows the textures, models, etc, from the original Call of Duty only. Is there any way to fix this?

Yes I tryed searching the forums for it, but I couldn't find anything (I probably just suck at searching).

Thanks.

I went to the CoDUO Mapping tutorials thing, but I am missing some things that they ask me to go to.

CoD Radiant works for CoD only.
To make maps for UO, you'll need to download the UO editor. It can be found in the UO section of the downloads.