BootDebug is kind of an odd ball tool. It boots up like an OS (using Grub) but is not really an OS at all. What it provides is a tool to look at the system in a very pure state, allowing you to see exactly what is going on at they very start of the system powering up.
This program boots the install bootmgr/ntldr for any given ISO file. Make a multiboot windows USB key with Syslinux and FiraDisk. Put one key in your pocket and install multiple versions of windows anywhere. Formats with NTFS.
Note: stored iso files must be contiguious...
Try any fragmentation program. zzz.
Example:
1. copy a large file then delete it from usb.- leave space.
2. run the entire fragmentation process.
3. edit menu.lst in /boot/grub (rename previous iso)
4. boot syslinux.
5. boot grub
7. run gparted
8. delete and reformat partion.
9. ...