I've been using the canon 1 series programs. The ones that require a serial number.
It's called Canon Digital Photo Professional.
It seems to do the trick for quick Raw changes, for major work I'll use Photoshop CS2.
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http://www.picturetrail.com/O1SalsaX <-----UPDATED 8/2/06

I got "IT" from ebay.
Now it burns when I pee..