Wouldnt have anything to do with the 2gig size would it?
What operating system are you using? There should not be a file size problem in Linux with ext3 or WinXP with ntfs. I am not using the x86_64 but when looking at one of the ftp mirrors the dvd iso is about 4.2GB.
I did like it when they released the dvd iso. Now I can walk away from the install without having to swap the disks.