mYthOx,
You're right about the ESX server not supporting ide disks. I have no experience with converting, but maybe it's a good idea to build a next version on SCSI virtual disks. Keep in mind though that you will need another client (windows) to host the ISO files through a windows file share.
I'll see if I can build a new version based on SCSI disks before the weekend and i'll send you a download link.