A couple of questions...
What device is the client using and have you tried H.264?
First you need to determine the format/codec the photoframe? supports.
Then you need to do some trial and error for export.
Photoframes can be tricky you might even have to adjust the gamma.
Unfortunately I haven't been given the specifications or even what device they're actually trying to play this on other than being sent an .mpg file and being told this works.
Strangely despite giving them an .mpg file and an .mp4 (H.264 codec) file generated by Premiere Pro and an .mpg file converted using AVS converter none of these files would play.
I'm stumped! Is an .mpg file generated using MPEG II different to one created using a different codec but still retaining the .mpg container? I'm not really familiar with all this other than what I've googled.
Thanks for the help!
Have you used GSpot or MediaInfo to inspect
the file they sent to you as your template?
Since 'Photoframe' seems to be an old & discontinued
product (replaced by 'PhotoSuite 7') it might require
MPEG-I encoding (I think that went out with CS4).