First of all, the obligatory
Rule 5 reminder.

If you change your question to "Which files do I need to make it work?", we can help you with that.
Good news: There is no .CHD file for MVsC2.
Bad news: It is not a great choice for testing since it is still marked "Not Working" AFAIK.
In addition to "mvsc2.zip", there are two bios files that you'll need: "naomi.zip" and "mie.zip"
MAME
should be telling you this info when you try to run MVsC2.
If MAME
isn't telling you what files are missing, you probably downloaded a "no-nag" version.
Get the official release -- the "nag" screens are there for a reason and will help you if you let them.
Once you get
everything working with the official release, you can drop in the "no-nag" executable.

Scott