I'm new to HTPC, my build is an AMD/4GB/500GB/Vista Home Premium with SP1/ASUS M3A78-EMH HDMI/additional nVidia 8400GS (using the SVideo output)/HVR2200 dual DVB-T Hybrid/MediaPortal RC2/PowerDVD7 Ultra/all the Microsoft updates/driver updates for motherboard & cards/DivX/no other codecs. The current TV is an older 4:3 using SVideo.

I've followed cranznz guide to installing Freeview and MediaPortal, and I've nosed around other forums here and there, but I've got a couple of problems and if anyone could help me that would be appreciated.

1. DirectShow Filter Control isn't listed in the left hand pane (between Remote and Weather) when Configuring MediaPortal, so I can't see the VMR9 or EMR option. I suspect Hardware acceleration isn't running because the CPU is 70-80% and it feels sluggish and displays blocky pixels when changing channels. I've been into the settings of Power DVD7 and this box is ticked Enable Hardware Acceleration (nVidia PureVideo). The nVidia Control Centre doesn't say anything more about PureVideo. In the Television section of Configuring MediaPortal I've selected the same options as crannz. Why can't I see the DirectShow Filter, where do I turn on Hardware Acceleration?

2. I tuned the Digital channels on both of the HVR2200 tuners, as cranznz said, and then manually added 2 Analogue channels for Prime (775.25) and our Sky Decoder (607.25) which the aerial signal goes through before entering the HVR2200. I didn't scan for Analogue channels because I don't want the other UHF channels. I've mapped Prime & Sky to both Analogue tuners on the HVR2200. Preview any channels works fine. However, when I start MediaPortal and choose a channel from the AllChannels group, if I choose an Analogue channel first and then change to a Digital channel I get the error "Unable to start timeshifting - unknown error occurred" but I can watch either Analogue channel. And if I choose a Digital channel first and then change to an Analogue channel I get the same error "Unable to start timeshifting - unknown error occurred" but I can watch any of the Digital channels. Am I doing something wrong in the channel mappings? Is there some trick when changing between the HVR2200 tuners or between hybrid modes?