Batch EXIF Data Modifications

Does anybody know of any programs which can batch modify the EXIF data on Canon RAW CR2 files? I've got about 500 or so photos where the camera year was set wrong. So far I've tried:
Exifer
PhotoME
Breeze Browser Pro
Automatic Photo Organizer
Photo Tools
Abander Photos Control
AiS EXIF
and none seem to support batch processing, even though some say they do.
I've heard it's possible using only Canon's tools, but I can't find the option to modify EXIF anywhere in Zoombrowser EX or Digital Photo Professional.

edit - so it turns out there's kind of a feature like this in Breeze Browser Pro - although it's not batch or exact, you can add 365 days to each time stamp

I know nothing about it but a quick search on Google returns a lot of hits. Two of them are:

http://www.thezeal.com/photography/2004 ... mages.html

http://www.lightstalkers.org/canon-cr2-files-photoshop

The first one is a RAW data workflow and the 2nd post is about opening RAW files in PS