If you want to try converter, just attach the disk to a physical host somewhere and run a normal conversion.
Once you have done this, create a new empty VM with no disks and attach you vmdk for the drive you want migrated to this new VM. Odds are that you'll get the normal NT Loader boot error when you try to boot it, but you should be able to fix this using one fo the following:
Diskpart
Fdisk
Recovery Boot
Alternatively, consider using something other than VMware converter - perhaps something like Acronis True image?
Good luck and please feed back.