Good news and bad news:
First the good news:
I've just noticed that the MAME core team has released version 0.69, looks like all it adds are a bunch of new drivers, so it should be a half-hour integration.
Now the bad news:
Apparently some of the features of version 0.65 (on CVS now) are not supported by the older VC6 SDK. The team has decided that it would not be worth it to release stripped down versions for VC6, so the older SDK will no longer be supported at all. The VC6 project files will not be included in future releases.