Hi Darren.
I´m here again. I wrote in another thread about lack of MPEG2 support, in CS6, and i founded a soluton of that problem, that problably will work for the cuda . This is ROVI TotalCode 6. This is a evolutution of former Main Concept 5. Like this software was developed around CUDA hardware, maybe will resolve your issue , like with this installation the machine will gain another brand new playback engine, and exporter capabilities via CUDA hardwate. I have this installed here , becaouse this pack resolves definitelly the MPEG2 support, in adittion will give a more advance CUDA inplementation. go to www.mainconcept.com and see if there is a way to test the software via a demo download.
Let me know if resolved your problem.
best regards,
Leossom.