Bobby Jay said:

Something occurred to me last night though. Back in the early 90's, when rumours about the prequels was beginning to emerge, I remember reading somewhere that Lucas planned to use images of Alec Guinness from his early movies to create a digital young Kenobi in the prequels.

**Yeah I heard that too--and I read somewhere-maybe AICN that there was a rumor Lucas had done digital scans of the SW actors in the early 90s(this would have been around the time of the Abyss-Terminator 2 where such technology was being developed at ILM).

I think the idea is interesting and bound to happen--whether its using archival footage altered like they did with Brando for Superman Lives (if you google you can find the making of footage) or altering the features of someone to more closely resemble a famous person.

Whether such an illusion could work except in brief bits--dont know.Would be hard to get a performance out of it that didnt seem artificial or not right-especially if you are familiar with the real person's movies.