I just "downgraded" my Amilo 1718 to XP for all the usual reasons (speeeeed!). All went rather well. ATI drivers installed. Realtek and HD audio installed. Even the wireless driver installed nicely (Atheros 5007EG). The only problem is that this laptop features a button to turn the wireless card on/off and this button does not work on XP. I consequently have a wireless card reporting "This device cannot start". I tried installing the Atheros Client Utility which will report that "The radio was successfully turned on" in quite obvious contradiction with the truth.
Have anyone managed to get wireless working under XP? I see my problem reported in other threads with no solution. I have tried a bunch of different drivers with no result. The button stays dead.