Hi Joe,
I had an email conversation with Mike over Xmas/New Year - I was having the same problem with installing on a Win7 64 bit for use in CS4 64 bit. Note that I have found no bugs yet in CM/PS 32 bit on a Win 7 64 setup.
Firstly you need to have an extra item for the installer to perform correctly - see this from Mikes email:
"Sorry about the trouble. I may be repeating myself, but have you installed the Visual C redistributables?
http://www.microsoft.com/downloads/details.aspx?familyid=bd2a6171-e2d6-4230-b809-9a8d7548c1b6&displaylang=en If the above link fails, do a google search for these keywords:
visual c runtime libraries 2008 64 site:Microsoft.com
I'm in the process of refactoring the ocx file so that it is an integral part of Curvemeister, and adding the redistributables to the installer, which should get rid of this particular problem."
Also note this:
"I've made a new release, version 3.0.18, with the expiration date changed to July 1 2010,:
http://curvemeister.com/downloads/cm3_beta/64bit.htm "
So this solved the install problem for me - however I've found that there is still an issue with using History, Favourites etc - for some reason these folders do not install with correct permissions etc and CM will crash (and crash PS as well).
Otherwise CM seem to work fine in PS 64 bit - just don't try to go to History etc.
Brian