Okay... I have it running on my desktop. Sorry to say though, I didn't do anything special, it came right up. I:
- Installed MapPoint 2006, taking all defaults except for path
- Installed CF RC4.2, taking defaults except for path
- Installed CFMP 0.83 taking defaults except for path
- Added CFMP as a plugin in CF
- Added CFMP as a button
- Clicked on CFMP and... it came up
You're using CF 4.2 and CFMP 0.83, right?
Have you installed .NET v2 _and_ .NET v1.1? I THINK CFMP wants v2, but I know CF only wants v1.1. (v2 is _not_ a superset of v1.1. You need to install both of them)