Unpack the ISO using qwix, then delete updatedash.xbe, update.xbe and download.xbe. Then repack using qwix but check (tick) the crosslink identical files option, the ISO will then be 4.37GB and can be burned on a dvd5 disc.
I looked up "gormless" in the dictionary, it said "without gorm" .... so i looked up "gorm" but it wasn't there ????