The problem is your multi boot configuration, it's not supported by Converter, in your case the system volume can not be found.
However once you transfer disk's data to the VM and then reconfiguration fails I could recommend to start VM from Vista CD, enter in recovery console and then invoke 'bootrec.exe /fixmbr' and 'bootrec.exe /rebuildbcd' and then run only reconfigure your VM and then try to boot it.
HTH