Ok, got it all going quite well now. XBMC + boblight on one windows machine - working with all video playback, as expected - zero lag etc (my machine is documented in build notes in my sig below).
1. Install lightpack and test with Prismatik - use the on screen grabbers to show you if the lights are working and grabbing as they should. Get this right now as you won't be able to use prismatik later. This is just a basic test - I had to swap channels 3 and 5 as there are some lightpack issues with the early run and the channels being funky. I mounted to my 50" plasma using the 'andromeda' pattern - seems pretty good.
2. Then, you *must* use zadig (Google it) - to replace the driver for this device to WinUSB - you should now have a device in Device Manager -> Universal Serial Bus *Devices* -> Lightpack
3. Download this zip https://dl.dropboxusercontent.com/u/1088...lightd.zip
- which has boldightd.exe, boblight.conf for a USB woodenshark lightpack kit, and needed cygwin dlls.
4. Unzip all this to into a folder called c:\boblightd - you don't need to change anything.
...and at startup (before xbmc) run:
c:\boblightd\boblightd.exe -c c:\boblightd\boblight.conf -f
(-c tells it to use a specific config file as above, -f tells it to 'fork' meaning you can then run xbmc in the same sccript or whatever)
6. Install and configure the xbmc boblight service addon - you don't need to change any ports/addresses since you're running it locally on the standard port. I set it all to 'fast' mode initially so it reacts quickly.
IMPORTANT NOTE : THIS BOBLIGHTD DOES NOT SEEM TO WORK IF YOU PLUG THE LIGHTPACK INTO A USB3 PORT (well, for me anyway) - use USB 2!!
If you're having issues, run boblightd as above from the command line and see what it says.
Hope that helps get others going - seems to me Prismatik is buggy as hell and slow, this boblight approach is best for those of us just using XBMC - but this will mean Prismatik no longer detects your lightpack, so it's really an XBMC only solution.