windows help building the ultimate bootable diagnostic tool? [View all]

[Phillip McCleod]

someone a couple months ago asked what the 'best' diagnostic tool was, but my new job as computer tech has got me searching for the 'ultimate' tool. i am comfortable in linux because thats what i learned in college but my job revolves around windows machines and clueless users so my boss want me to stretch my comfort zone and find windows-based solutions.

here's what i started putting together but any added ideas would be welcome.

dual-bootable 320GB external usb 3.0 hard drive with four partitions:
/dev/sdX1 - dedicated boot partition home of chainloader (grub2 for now)
/dev/sdX2 - system1 (40GB, ext3): backtrack 5r3 (ubuntu packed with forensic apps) plus testdisk and clamav
/dev/sdX3 - system2 (60GB, variable): variable isolinux, windows, mac osx, vm's, etc
/dev/sdX4 - data (216GB, ntfs)

i'm pretty happy with system1 (bt5+) but system2 i could use help with. i'd like to go ahead and install windows 7 and diagnostic tools on it since i mostly work with windows systems but what would you pack into a windows-based diagnostic? are there any specific recommendations for windows apps or even console commands equivalent to 'testdisk', 'gparted', 'photorec', and 'dd'? what about pro-grade antivirus apps up to the task of removing rootkit and other pernicious malware?

i can't believe i'm saying this but.. i need windows help!