I tried to install IMS with 2.1 VMPro - no luck at all.
The database service DCOM component would not show up in the list of services/DCOMs even though the installation program reported it installed OK.
Various other IMS related problems also based around DCOM communication. The installation was over 2 domains, though still should have worked.
Spent a lot of time trying to get it working - uninstalling, re-installing etc. Nothing
removed EVERYTHING and re-installed using 2.0 - all worked first time. :(