I just want to thank you for taking the time to put together such a great and easy to use script / tutorial. It was easy to follow and worked flawlessly for me. Well, there was one small hitch. I needed to edit the script to match that of the .iso file name (bt4.iso). In the script it refers to the prefinal iso name (btisoname=bt4-pre-final.iso). I changed bt4-pre-final.iso to bt4.iso and all went smoothly. Hopefully this helps someone.