[WINDOWS] Boot directly to XBMC for Windows (in full-screen) as the shell on Windows?

Hey guys, just put together my first HTPC and now i'm trying to get XBMC to start up directly at boot but I'm having some trouble getting XBMC to stay in focus.

I tried both

"For Windows 7 and optional EventGhost : Using Windows 7 Group Policy Object Editor"

and the Silenlaunch way, but with both ways i end up with XBMC beeing shown in my left corner, minimized.

I tried adding -fs p switches after xbmc.exe but that didn't do anything.

I then created an advancedsettings.xml file and put

<advancedsettings>
<fullscreen>true</fullscreen
</advancedsettings>

in there but that didn't help either.

Some help needed guys!

hey there
after a long try to make my lenovo q180 dualboot with win7 and ubuntu 10.10 ive came to the end and just made in win7 an other user so living room for just surfing and skype and so and the xbmc profile with autostart. (Windows 7 Group Policy Object Editor ) this works perfectly fine but ive got no internet access on the xbmc it says on the top conected but on the bottom no conection check conection settings (at network where u can see ip adress etc)
it is connected over wifi

pls help
leonn