When it says that it broke, give me the section of code it pointed to, and highlight the line. Then I can try to fix it.
Make sure you always run the uninstaller with 'Run as Admin" first. Otherwise, Vista/Win7 protects the Program Files and gives it trouble. I recommend you grab a fresh copy of RoM 2.81 and start over.
The last version of my modmod's that were made for 2.71 was v1.351. Be warned, it lacks many of the features here, and there are some bugs that I fixed in later versions.
You can download v1.351 here.
I meant delete the RoM folder, and I'm using XP
