Right here goes,,
1, HV 20 GREAT PIECE OF KIT, But my AMD 2600 does not support an
sse2 instruction set!!!!!( OH DEAR!) So after rushing out to buy a full copy of xp thinking this will solve the problem it still doesnt support sse2 because of the processor. elements demo wont work because of me not having sse2
so sony vegas demo does,YEA HARR!!!

ebay for sony vegas
But it doesnt stop there because in the help menu of vegas it clearly states that untill the video is rendered the preview window wont playback smoothly( im using a seperate 17in monitor and it looks worse) so what you need is all the latest drivers for windows and windows media player 11 and this will work fine with vegas if you lower the preivew playback quality. this does not effect the video in the time line. once the video is rendered it plays back smoothly. vegas also can import the video in hd or standard dv on mine it works fine after chucking some money at my pc.. you can also tweak vegas to the amount of memory that being used.
I hope this helps
cheers