Hi Kay,
I was running with the "User must enter their password" option on. I have turned it off and SuRun works correctly now. Will the password issue be fixed in a future release? As for a virtual machine with samba installed I am not aware of one that is preconfigured. You could download this:
http://www.vmware.com/appliances/directory/55047 and follow this howto
http://ubuntuforums.org/showthread.php?t=640760
Jeff