Microsoft has released an update to the VMM 2008 Configuration Analyser. You can get a copy of it for VMM 2007.
“The VMMCA is a diagnostic tool you can use to evaluate important configuration settings for computers that either are serving or might serve VMM roles or other VMM functions. The VMMCA scans the hardware and software configurations of the computers you specify, evaluates them against a set of predefined rules, and then provides you with error messages and warnings for any configurations that are not optimal for the VMM role or other VMM function that you have specified for the computer”.
You’ll install this tool either on a server that is or will be running VMM 2008.