16 Jan '04 Update: I received an e-mail recently from . Malcolm has the 300D and was clearly more motivated than me to make the plug-in work with his new camera. Rather than try to summarise his method, you can read the full text of his e-mail here. I haven't tested his method, but it does make sense. As always, the advice is to work on a copy of the plug-in.
Those of us who have both Adobe Camera Raw and the Canon EOS 10D will be pleased to know that the plug-in can be patched so that it will read raw files from the new camera. Adobe are not planning to release updates to Camera Raw until it is included in Photoshop 8. While this patch is not strictly legal, it does seem to have the unofficial sanction of Thomas Knoll who has commented on it in several forums posts. The Luminous Landscape's Michael Reichmann reports that he has spoken to Thomas Knoll who confirmed the patch will work, but warned "that the 10D has a slightly different color space than the D60, so the temperature/tint sliders will not be calibrated accurately." (See What's New March 18, 2003.)
Here's how a step-by-step explanation on how to do the patch.
1. Locate the existing plug-in file
Unless you have installed Photoshop and/or Camera Raw in a non-standard way, you will find the plug-in file here:
2. Copy and rename the plug-in file
It is called "Camera Raw.8bi". Make a copy of this file, in the same folder, called "Camera Raw 10D.8bi". You should not patch or modify the original file. If you make a mistake, you can always delete the "Camera Raw 10D.8bi" file and start again.
3. Load the new plug-in file into a hex editor
To do this I used a freeware hex editor called XVI32. This was the first time I used XVI32, and patching proved simplicity itself.