Colour cast scanning old negatives

[raycer]

I have been scanning my 25-30 year old negatives with Canon 8800F scanner and archiving them in my computer but I find that many of the images have a yellow cast, no doubt due to age or chemical reaction. I use 'Remove Color Cast' in PhotoShop Elements 5.0 but it is only occasionally successful and then I have to keep clicking on various parts of the image until it sometimes works. When it does work it often leaves a blue tinge. Using 'Fading Correction' in the scanner software does not help. I've got hundreds of films to scan and it is very laborious editing every image. Has any body else had this problem and got round it?