"Rough Presentation" you said it ^. Maybe there are a few more useable bits if you've got super CGI skills. Mostly it's stuff not worth rescuing like Spielberg's 16-hour Grievous chase animatic ;-)
If I recall, the only two bits that are in a fit state are: a scene on board Grievous' ship and the extended talk between Anakin and Palpatine in the office (The latter is essential for a ROTS edit IMO).