I have read with interest the post by Sharaz191 and the help he got from Neo and Bassix to solve his problem. I have a similar problem. I had to install Vista under XP as the DVD isn't bootable. I have tried to use the advice that was posted by Neo and Bassix last week but it doesn't work for me. I have downloaded oscdimg.exe but I am not too familiar with the command prompt. I have tried Nero, ISO Magic, UltraISO, Alcohol120%, VistaBootPro but I end up against the proverbial brick wall. I have burnt 7 DVD's and none boot. MY DVD is drive I and XP is on C while Vista is on drive F. I cant boot into Vista without having C on the dual boot menu as the MBR must be on C (I suppose). What I hope is that someone can post a step by step procedure, in particular the Command Prompt part. From the other posts I think I need to convert my ISO file type to UDF. Although Sharaz191 was able to do this with Alcohol120%, I have tried but can find no option to convert ISO to UDF on any of the apps I have mentioned above. Thanks in anticipation, RobGlen