1.What does the mod do ?
2. What verion of UT are you running? UT99 , UT 2003 , UT 2004?
3. What are the names of the files you have to install?
this stuff will help us answer your question better.
Also the uz.gameservers link is not the best place to download mods. Its best to get them from other sites" sites that offer the zip files I.E. - all files that go with the mod (textures, music , sounds , readmes' , excetra . . .). Gameservers.net is a ftp server redirectsite.