@ Simon

thx for your detailed answer.
the tip with the datapath is great, to still have a setup screen.

also the version with mac mini´s.

well, the scaling thing is something the clients have to choose,
sometimes they want to have "true" 1920x1080,
even if 1280x720 would look the same.
i think in this case i can tell it my client and he has to choose what he want,
or if the time is available to test it on the real location.

it´s not a real project currently,
maybe happening in spring 2013.

i´m working a little bit with pandoras box, axxon and picturall octo mediaservers,
last year at the bregenzer festspiele we had a catalyst playing content on a moving scenery piece which worked very well ( i think they use the exact map thing),
so i become interested in catalyst.

will work on catalyst and hopefully have some projects in the future.

also great forum here !!!

regards,
roman