It works only with Ubuntu 6.10. You install Ubuntu like normal first, and then download the LMCE installer. LMCE runs on desktop 11 (ie ctrl+alt+f11). The LMCE installer gives you the option of starting ubuntu by default (and launching LMCE from the ubuntu menu), or launching lmce by default by interjecting itself in the ubuntu boot process, so if you don't have k/b or mouse attached, it will always boot up as a htpc.