As those clever Silverstone guys decided to hard-code the function of the buttons of my HTPC cabinet, I had to fix it :-)
The stuff below will let you control sensible things in the HTPC-app MediaPortal ( http://www.team.mediaportal.com ). Unfortunately, I could not find any way to pick up the commands of the big volume/click wheel.
Irritating ;-)
;previous track SC110::F7 ;next SC119::F8 ;stop SC124::b ;play/pause SC122::p ;mute SC120::Enter ;vol up ;routed to arrow up SC130::Up ;vol down ;routed to arrow up SC12E::Down