You can PM him, but he's a pretty busy guy. I was in the same situation as you and for the life of me couldn't get 2.2 to run at all (Tried a WD USB hard drive and a Sandisk Cruzer). I gave up on that and used Xplorer360 to install my softmod.
http://forums.xbox-s...howtopic=650961^ldot's tutorial on Xplorer360. It's the easiest way you can do this. Remember, you have to disable UAC to use this. From there, it's as simple as dragging and dropping. If you happen to get stuck on the UDDAE part because you can't find the files being referenced, it's because you didn't select that option in NDURE, in which case you can skip. If it doesn't work for you for whatever reason, I can package XBMC into either Shademan or mhackxbox's ready-made softmods and PM you a link to my Dropbox.
Alternatively, if you can find an old computer with an IDE disk drive in it, maybe even buy one for next to nothing from a local computer parts store or parts recycling center, you can run 1.9 that way. I had to do that to upgrade my HDD. Just put them both on cable select, have the drive on the middle IDE cable and the Xbox HDD on the end cable. Go into your BIOS and turn off autodetect on IDE Master (Appears as [not installed] on ASUS mobos like I have). Power up PC, pause/break at POST, hotswap, press enter, boot menu, boot from your drive.
As for the markers on your Xbox drive, they're written on the chip directly underneath the jumper and are abbreviated as "MS" "SL" and "CS". You want "CS" for this. It will most likely be the position on the far right and will be set to that in it's stock state.
Edit: If you end up with a disk read error in XboxHDM or your computer fails to POST or you get a "Please insert boot media blahblahblah" after you select your CD/DVD drive in the boot menu, these are all three cause by IDE master not having Auto-detect disabled. Poke around in the settings there and try different things until you get it. It took me five days to get that part down.
Also, before you do anything with XboxHDM, go into your BIOS and DISABLE the USB host CONTROLLER. Just the controller. Leave the USB itself enabled if you're using a USB keyboard.
When you're done, be sure to enter your BIOS and load factory defaults (F5).