RAM to RAM

I use a Panasonic DMR-EZ48V for recording on RAM discs which ends up with a DVD_RTAV folder consisting of VR_MANGR.BUP, VR_MANGR.IFO and VR_MOVIE.VRO files.
It plays fine on RAM recorder/players, it also playable on my PC.

However when I save the DVD_RTAV folder to my hard drive and then burn it onto another RAM disc it will not play, the DVD player displays “unsupported”. It will play on the PC however.
This new RAM disc shows exactly the same files (VR_MANGR.BUP, VR_MANGR.IFO and VR_MOVIE.VRO) as the original disc.
Why, when I have created a clone of the original disc won’t it play on my DVD recorder?
I have used Nero for doing this, I have also used Ashampoo which gave similar results.

Maybe it is to do with finalisation but I think it is done automatically with Nero!

You may ask why I want to copy on to RAM discs. It is because of the versatility of RAM, easy editing etc.

Pete