Hello and thanks Hyrax.
I have just done what you suggested.
I have run hd patch over the original PAL hd file.
The first header was set to the 29.97 ntsc format.
I opened up MF6, settings to NTSC (I'm guessing thats what you'd meant)
and created not only the hd dvd files but also an iso.
Burnt with nero and ...
GUESS WHAT...?
It worked !! (both the iso burn and the hd dvd file burn)
BUT.. the playback was jumpy BUT VERY VERY CLEAR on both..
FINALLY THE QUALITY THAT A HD MOVIE SHOULD BE !!!
I then followed with your 2nd suggestion and patched the first of the evo files and final results on disc were the same as the above...ie

layed, jumpy but very clear.
You are obviously on the right track but I sense the jerky/jumpy playback relates to the 25fps/50hz stuff rather than what MF expects with the NTSC setting.
Tell me if I'm wrong but the Toshiba needs to be able to work with PAL HD files??
It only wants to work with what it sees as NTSC.
When the original PAL files are encoded back to NTSC with procoder, authored with MF AND burnt, the playback is much smoother but the quality is lost to a noticeable degree being a bit blurred in detail.
Another important point with your suggestion...
The MF6 project completes VERY QUICKLY to completion and I'm sure no other encoding is taking place with the input file that has the first header changed.
At first I didnt' get the option of setting the project the same as the imported HD file but later did.
I am confident MF didn't re encode the PAL files ! (well done)
I'm not sure how multiple HD PAL imported files would go after each one had the hd patch treatment. I will try this out later..
But for now, I am hopeful that this information will assist many people.
Unfortunately the final picture with this method IS JUMPY but at least with the high quality of clarity gives me something to look forward too !!!
Suggestions ??
and thanks again !