Installing SS2005 RTM on machine which previously had CTP versions

Hi, when trying to Install SS2005 RTM on a machine which previously had CTP versions, the install is failing with "instance all ready exists" for SQL server an analysis server after about 30 minutes, the old versions where removed successfully via control panel.

I vaguely remember an article saying MS had a tool to clean up all the old references to the various CTP versions, but cant find a link for it, it is late so I maybe dreaming, but could somebody point me to it? I will be very grateful

Thanks

Pat

The file can be found in your CTP installation dir (sqlbuw.exe).
Shameless request to visit my blog where the exact location can be found :-) But a Search will get you going too :-)