It seems that some enterprising Russian programmer has hacked the Canon EOS 300D firmware to create a new version that contains some of the custom functions found on the more expensive and complex EOS 10D. Apparently the following functions have been added:

1. Set button functions:
  a. change quality
  b. change settings

2. Make a shot without a flash card
  1. available
  0. not available

3. Flash synchro in AV mode
  0. auto
  1. 1/200

4. RAW+JPEG writing
  0-5 - size of embedded JPEG image

There’s a LOT of discussion about the undoubtedly illegal and warranty-invalidating new firmware version over on the DPReview Canon EOS 300D forum, and it looks as though it works for many people. If it was my camera, I don’t think I would touch it with a very long bargepole, even it it does work…

Website: DPReview - “New” Canon EOS 300D Firmware

Website: DPReview - “New” Canon EOS 300D Firmware Risks/Benefits