Hi,
I had a problem with my DVD multiboot when it exceeds 4.xx Go (I don't remember exactly the xx) : WinPE and Windows XP Pro SP2 fail to start : ntoskrnl.exe or setupdd.sys could not be loaded ...
Now, this disk becomes large in size :
Geexbox
Amiga Forever
WinPE 2005
VistaPE beta 009
MSDOS 6.22 installation
Windows 3.11 installation
Windows 95 installation
Windows 98 SE installation
Windows ME installation
Windows 2000 Pro installation
Windows XP Pro installation
Windows 2003 installation
Acronis suite
Paragon NTFS Linux Rescue
and some other small tools ...
All of them work fine.
The last added tool was Knoppix DVD version. WinPE did not boot correctly. If I delete Knoppix DVD from the DVD multiboot, WinPE works.
I have read somewhere that if you enclose a file in a deep directory (large number of subdirectories), this file is written far in the ISO file (then it is burned towards the end of the CD/DVD disk).
I decided to place the file system KNOPPIX in the directory path \KNOPPIX\FS\K\K, deeper than \Windows\system32\drivers.
Therefore, I assume that the ntoskrnl.exe and setupdd.sys files are burned under the 4Go limit on the disk.
Result : WinPE loads normally without error. The same for the other tools.
Hope this help someone.