Advanced multiple screens settings

[Pivetta]

Hi Ubuntu users!
I'm working on a project involving multiple screens with different resolutions, sizes and aspect ratios. On them I have to run a game (in my case) as they where one big screen, so by taking care of the sizes and the contours of each screen.

Here a picture I made to explain my issue:
http://www.pasteall.org/pic/show.php?id=65193
I assume I could do something trough compiz, to manage this. Do you know any application (I couldn't find any) to manage desktop like this?

Thanks

Pivetta

EDIT: (just checked now that the PAL resolution is wrong, but doesn`t matter, its just an example)