MSVC is
NOT included in this ROM.
If you have a copy of it, it works perfectly in all respects once installed.
I think that what the person was saying was that modifying an existing ROM that is normally
not charged for by anyone is less likely to cause trouble than distributing it with a program that does cost money and requires a license to purchase/sell (such as VoiceCommand). Some versions of WM6 might come with MSVC; this is not one of them. What everyone who is using MSVC on WM6 is saying is that it integrates perfectly. A few people seem to have had some issues, but just about everyone has resolved them by performing a hard reset after flashing or reflashing the ROM and interrupting the provider customizations.
It's working great for me.