Thanks for that p/w.
Today I tried Mythbuntu and it gets me to the exact same place as Mandriva.
BTW that looks to me like the panels and fields of a software, but for some reason I cannot see the text that should be there. There's a panel at the bottom right that seems to be the 'do it' button because when I put the cursor there and press enter the screen changes - just to a different lot of blue shapes. And there is a button at the bottom left that is the exit button.
Reading the system requirements for Mythbuntu
http://www.mythbuntu.org/requirements
I seem to have enough processing power (AMD Sempron 3300 - 2000MHz, required 1 GHz) and ram (1.5gb - required 192mb) but I am not sure about the volume of ordinary disk-space needed - nearly 100gb. At this time I have about 150 gb spare but spread over several drives, and they are NTFS. I do it that way because although linux oses can use NTFS, windoze cannot use linux partitions. This way whatever I am booted into has access to all the files. Hopefully I can tell MythTV where to store files.
And yes I installed frontend and backend.
I'll try MythtvOS again now.
I did try but no luck except that I am now sure that the blue shapes I have been seeing is actually MythTV but in some editable photo negative-type form because the bottom-left and -right buttons are in the same places and it just feels like it. I think tomorrow I may switch the PVR350 to my newest build pc which has an Athlon 2.8GHz processor. The box says '64' - and 'true dual core design': does that mean I should be running the 64bit system ?
Does MythTV need online-access? I would like to run MythTV on a separate pc from my torrents etc.