Use GIMP and the RAW file tool UFraw. Alternatively, use Adobe DNG converter, the DNG format is royalty free and can be read by many other tools as well.Octarine >> Am back home now.. Tried installing DPP, but there is some software problem. I tried downloading an older version. It works but doesn't open my CR2 files. So updating using the updates from canon, but installation stops towards the end. So I'm gonna get a diff RAW file editor. Gonna try GIMP and Capture One Pro. Shall not get stuck in 3rd gear!!! Thanks!
While Capture One Pro is a good tool (I use Lightroom), you will need to buy a license to continue using it after trial period. And you cannot export the RAW processing steps for further usage.