Are you running Scart - Svideo into your HVR-2200 Svideo port, if so how are you doing the audio from the Sky box ?? im assuming you are using the 2 RCA plugs on the Scart - Svideo lead into 2 RCA - 3.5mm plug into the 3.5mm jack into the HVR-2200. If you are then this means I could dump my PVR150MCE and just have the HVR-2200 in my HTPC using it for the Sky signal in VMC and using the 2xDVBT onbard tuners in DVBViewer for FreeviewHD.
I have an HVR-2200 and am doing exactly what others are doing in terms of feeding sky through it. For the audio requirement, I just use one of these...
http://www.dse.co.nz/cgi-bin/dse.storefront/48bb407905da21e0273fc0a87f3b06ed/Product/View/C1253
The sockets (obviously) plug into the ends of the 2 x RCA plugs, whilst the other end plugs directly into the audio in of the HVR-2200.