[vdr] How to get blank screen after watching recording?

I'd like to use my vdr more like player for recorded progrmas, and not showing online TV programs unless it is really requested. When I put some sutaple program playing for my kids I don't want VDR to show that crap TV is showing when recorded program ends. Just hitting news may result nigmares and sleeppless night :-(

Therefore I would need something like blank screen, or maybe mp3 plugin playing music after show ends. Or image plugin, or nearly whatever else than TV program.

Ready-to go patches, or tips for starting points on vdr code welcome. Haven't done any code for VDR, but I'm familiar with C++. Oh well, kids (now 1 and 4) have moved out before I have time for it...