Malcolm and Mark,
Thanks for your replies. Malcolm's answer doesn't do the job, because a want to use the center as controller (my system includes G68, G98, 7000's front and 5200's for rears and center). The reason for that is that the G68 is a bit out of reach if i'm watching a movie. Pressing function and control keys doesn't work. I didn't look at Mconfig yet. I could live with using function/control keys, but as said is doesn't work. I will ask Meridian support.
Paul.

G68ADV, G98DH, 7000, 5200, 5200HC, JVC LCD, Samsung HD cable-receiver, Gefen 4x2 HDMI switcher, MIT cables and Logitech Harmony 1000.