Opened my Box (1.1, Thomson drive) found the LPC points and DO and laid the chip down on the board. Fired up the Box, soft flashed with 4977, and set up a retail HD with Slayer's disk. 45 minutes later I had a newly modded Box that was ready to play anything I threw at it - as long as it was DVD-R!
Special thanks to Jon Solo (Dante) for his soft-flash tutorial, Slayer for his Auto installer (nice skins too!) and Xbox-Scene.com for a truly content-rich website.
Ok now what? I guess it's off to xbins.org to see what cool homebrew stuff I can put on my *NEW* Box....