This problem is slowly being cracked. I have valuable stuff that I can process but as you can see from the forums it's no easy task.
JVC .MOD files straight from JVC Everio are changed by well known file extension trick and as pointed out these do not have all necessary file atributes to be further processed especially by Premiere but they do for Flash 8 Pro. and .flv files are straightforward to make from converted .MOD to .mpg files.
To edit the trick is to import the .mpg files into Premiere6 & 6+ but NOT TO PLAY THEM then drag to Time line and Export Timeline as Quicktime format and fully editable .mov files can be re-imported for any editing process you need.
When I am fully satisfied and have documented procedure I'll post it If any one is interesed

