On using original disc S7 disc, Vista will not open it to allow serial
number to be keyed in so I guess I am better to buy a full version.
Wasn't my reply clear enough? Sorry
You insert your S12 upgrade disk into your Vista computer without any other Pinnacle software installed.
You run the s12 disc, or it autoruns. S12's installation routine asks you to remove the S12 disc, hold down the shift key and insert the old S7 disc.
When you have done that the S12 installation routine then asks you for the serial number associated with the S7 disc.
It then tells you to swap the discs back, holding down the shift key.
Installation then continues as if you had a full version.
Regards the versions, there are a few things fixed in 12 which probably won't get fixed in 11 (there are a few things broken in 12 which aren't in 11 that might get fixed). 12 has some nice new features. Check out the different plug-ins you get between 11 and 12 with Ultimate - I think 12 offers better ones.
All Plus and Ultimate version of Studio 11 and 12 handle HD