I use to be able to export a media 100 timeline to after effect.
When I exported out of after effects it would create and xml file that I could open up in after effects 6.5
I've upgraded to after effects 7 and now when I try to import the xml file into after effects, it's "grey'd out"
The workaround is to open the xml file with after effects 6.5, save the after effects project...then open it up with after effects 7
It works but it's a pain.