Large tff files in cs2

I have cs2, old I know, and find I can't open large tff or raw files, only jpeg. I want to use the non-compress files from my camera. Any suggestions? I heard there was a update a few years ago to allow such. Any help will be appreciated. I don't use the program enough to buy the new version.
thanks, dale

Which operating system are you using?
Is photoshop cs2 updated to version 9.0.2 and camera raw 3.7?
(you can get the photoshop updates from here: Adobe - Photoshop : For Windows)
What happens when you try to open the files?
Have you tried restting the photoshop cs2 preferences?
By Raw files, do you mean camera raw files from a camera and if so, which one?
How big in terms of pixel dimensions are the tif files your trying to open and are they from your camera or some other source?

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