This week I have been adding functionality to RMPrepUSB. It now has the ability to overwrite the MBR code with the standard Win7 MBR boot code and thus replace any grub4dos/syslinux boot code. This function is actually in RMPartUSB and so can be scripted too.
I have also been looking at WEE which is a cut-down version of grub4dos bootloader. WEE has an integrated menu and needs no external files such as grldr or menu.lst. It also can be loaded by bootmgr directly (unlike grldr which cannot), thus you can configure your BCD to load WEE and from WEE you can load grldr. This gives you a way to boot to grubdos from Windows 7 (or Vista or Server 2K8) even if your boot volume is BitLocker encrypted - See Tutorial #68.
I have also included a Disk Doctor utility in RMPrepUSB which allows raw sector access of a disk. This utility is nowhere near as polished as WinHex or HexEdit ,etc. but it does allow testing and editing of USB flash drives (actually all drives).
The next thing may be to also add a drop-down menu to RMPrepUSB to make some of these features more accessible!