Yep, that's the area that gingeRS is talking about.
I re-cased my touchscreen into a DIN foldout casing, the same as yours actually, it works pretty well but it depends what you're actually re-casing, normal composite TFT or VGA touchscreen?
The VGA touchscreen is a real squeeze because of the touch panel and extra control boards - also the VGA cable routing is an absolute bugger so folding the screen away is an art-form!
Apart from that it's pretty sweet - would be alot easier to do with a normal composite screen as you can simply use all the cables that are pre-routed in the casing.
Cheers,
Andy