Tools in BartPE for to make bootable:
peinst is designed for NTFS\
pe2usb is designed for FAT, except that it requires formating which is not an option
It's not an option because I want to install bartpe to a portable drive of 500GB that is full, and my computer's hard drives are small by comparison.
What's the solution, how can I make bartpe bootable on a fat partioned hard drive without formating that hard drive?