1) Felix wrote: "The more complex way is to write an AppleScript that 
goes through the list of EyeTV's windows and identifies and closes the 
Live TV window."

Timo: It actually looks like there was already such an action. I tried 
predefined EyeTV action "Close video windows" and it seems to work 
exactly like I wanted. 
(And looks like there are too many actions in RB for even you, Felix, 
to remember :-))

2) This worked the way I wanted when I changed "set full screen to 
true" to "set full screen menu to true".

Thanks a lot for you help, Felix. 
Remote Buddy covers now quite nicely most of the things that I want to 
do with my Mac mini HTPC set-up. Excellent!

br, 
Timo