Puggo - Jar Jar's Yoda said:

There's no way normal color could be restored to PG, it would be like asking Adywan to polish a turd (especially reel 2).

You might be surprised. I know I was when I first saw what he did with his HD Special Edition of Episode IV. If the color is really bad on PG and one setting won't fix everything satisfactorily, maybe different rules can be applied (do whatever it takes to fix the color to make it look the best it can).

If you still need convincing about what is possible, check this out: http://www.youtube.com/watch?v=yiJ9fy1qSFI

;-)