Had a few family problems yesterday but eventually I managed to get around to my project. I have successfully imported my edited but unrendered timeline from Premiere into VideoStudio, tweaked the Distort Option within attributes and then exported from VS bt creating a Video File choosing DV 16:9.
The file size is about the same size as the original and it seems to play back fine in MF7.
Nice one!
Now at long last (I think!) I can get on with the job of authoring.
Thanks again for suggesting that process
roz