Thanx. This is my final XP project, following andregascal's Multi-Boot DVD architecture from this very sub. Essentially the two trees shown below are the target(s) of interest:
$1\INSTALL is completely redundant under both trees and I386 probably has significant duplication as well. I suspect this is the last time I will ever do any work on this project, given XP's EOL is just over six months away. Once in a blue moon, I revisit this idea as I periodically recall a bootleg 10-in-1 Windows setup disc. I never actually used that disc more than once or twice, several jobs ago, but I've never forgotten the hack.
I recently gave up on my own Windows 7 AIO, as the combination of enhanced drivers and slipstreaming of all Windows Updates for each architecture has made that dream permanently impossible.
I don't use hardlinks right now and use IMGBURN for mastering and burning. With the exception of being unable to script the generation of the ISO, IMGBURN is the best CD/DVD burning tool for Windows or Linux. But I will look into OSCDIMG as possible candidate for cooking this special disc.
Thanx for the use of the brain cells...