For anyone still having problems with UOC, I found a much simpler install method.
Download Link
1. Turn off your UO clients
2. Run the Installer and take note of where UOC installs
3. Place everything from 'Labels' into the same folder that UOC installed to
4. Right click on UOCartographer.exe, go to properties and select to run this program in Compatability Mode with XP SP2
5. Open and close UOC once, a folder will be created in My Documents called UOCartographer, ignore the error
6. Place everything from 'My Document Files' into this new folder in My Documents
7. You should be good to go!