Hi Guys,
i have made a short tutorial for using the mia_exposure_simple shader. Sorry it is in german, but the screen shots from Max9 are in english. 
link: http://forum.german-mentalray-wiki.info/viewtopic.php?t=599
i think for 2 a´clock pm it is a good exposure

mfg
hot chip
(nix für Ungut)