In light of the release of the official Microsoft 120GB hard drive for the Xbox 360, TheSpecialist has released an update for HDDHackr. With this solution, you should be able to create your own 120GB Xbox 360 HDD using a Western Digital Scorpio BEVS-LAT drive. Here's TheSpecialist's message that was sent to Xbox-Scene News regarding the HDDHackr update:

"Attached is the latest version of the hddhackr. It works with the new 120 gb signature. However, this current version can not dump the hddss.bin file automatically from that drive, you'll have to manually dump sectors 16-22 with a tool like winhex and save them as 'hddss.bin'. After that, continue as normal with the hddhackr and everything will be fine.

Also, I'd like to stress that there are 2 versions of the WD BEVS drive out there: the 'RST' and the 'LAT' version. This tool currently ONLY supports the 'LAT' version ! You can find on the sticker of the HDD which version it is. I'll hope to be able to support the RST version of the drive in a future version of this tool."

What's nice about this is that if for some reason you want to use your HDD for your PC again after running it through this tool, there's an "undo" button for your use. It should restore the HDD.

The download below includes the application itself, the readme file (PLEASE READ THE README, they're called that for a reason). However it does not include "hddss.bin" for obvious reasons.