Thanks so much for this... it's got me so close to solving my render problem 
I don't know a lot about scripts so I was wondering if this can be used to render out to .exr format so I can composite in Nuke? I keep getting IMG formats and Nuke can't recognise.
So grateful for your help!
Hi Jingo, it can with a little modification; I'll take a quick look tonight and see if I can get a copy up. Nuke should be able to read most formats, including PNG. Try dragging & dropping a frame into the comp tree, and see if it loads.
Imagination is more important than knowledge.