You can go to setting 1\Xm radio check the little box for "external radio application" and then press browse and then cancel..... so you will have path:none.Stupid people always click the XM thinking I have it. I know I could make a skin w/o it, but I'm lazy
That way if somebody press the button it will do nothing.
I don't understand the OSK part but it seen like you don't want it right? so for that you can do this in skin .ini:
So you can click search and have the artist, album, title box but as soon as you click one of them you will have no OSK.