Creating Bootable USB with UBCD, MS ERD 5.0, 6.0 & 6.5

I've created a bootable USB drive using Grub4Dos.

I have microsoft erd versions 5.0, 6.0 and 6.5 as well as the ultimate boot cd configured.  The MS Erd version 6.0 and 6.5 both boot fine but I am having problems getting the UBCD and ERD 5.0 to boot.  Boot start to boot but just after the XP logo goes from screen I get a BSOD.

I know the iso's I have used work as I can boot from them when they are put onto CD.

This is my menu.lst file

### MENU START
title ERD Windows 7\n
ls /images/erdwin7.iso || find --set-root /images/erdwin7.iso
map --heads=0 --sectors-per-track=0 /images/eerdwin7.iso (0xff) || map --heads=0 --sectors-per-track=0 --mem /images/erdwin7.iso (0xff)
map --hook
chainloader (0xff)
### MENU END


### MENU START
title ERD Windows Vista\n
ls /images/erdbitvistawindows.iso || find --set-root /images/erdbitvistawindows.iso
map --heads=0 --sectors-per-track=0 /images/erdbitvistawindows.iso (0xff) || map --heads=0 --sectors-per-track=0 --mem /images/erdbitvistawindows.iso (0xff)
map --hook
chainloader (0xff)
### MENU END


### MENU START
title ERD Windows XP\n
ls /images/erdwindowsxp.iso || find --set-root /images/erdwindowsxp.iso
map --heads=0 --sectors-per-track=0 /images/erdwindowsxp.iso (0xff) || map --heads=0 --sectors-per-track=0 --mem /images/erdwindowsxp.iso (0xff)
map --hook
chainloader (0xff)
### MENU END


### MENU START
title Ultimate Boot CD \nUBCD.ISO  (689 MB)\n
ls /images/ubcd.iso || find --set-root /images/ubcd.iso
map --heads=0 --sectors-per-track=0 /images/ubcd.iso (0xff) || map --heads=0 --sectors-per-track=0 --mem /images/ubcd.iso (0xff)
map --hook
chainloader (0xff)
### MENU END


I've used XBOOT to build my drive.