Posted 30 June 2007 - 06:10 PM
Both VMWare and VirtualPC can have problems booting big ISO's. Virtual PC in particular is well known for failing on large ISO files.
Do not assume that your DVD ISO is a coaster yet.
1. Whenever testing bootable ISO files that are bigger than 2gig's in size, always mount the ISO to a virtual drive (Alcohol 120, Alcohol 52, Daemon Tools, , Elby Virtual Clone Drive, MagicISO's MagicDisc). Then reference the virtual drive letter instead of the actual ISO file.
2. The NTLDR is probably a result of the above issue but if it still exists, try making a cd size ISO with just a few OS builds at a time. If they work on a CD size ISO, they will work on a DVD size ISO.
Additionally, problems may arise if the DVD is bigger than 4 gig's. I remember reading that causes some additional booting issues if not handled correctly due to the placement of files on the actual disc.