I use Photoshop CS3, but I intend to upgrade to CS6 by the end-of-the-year deadline for free or reduced pricing. However, usually the raw image processor that came with the camera's software CD does the job. I also understand you can use the raw processor in Photoshop Elements, but I never did that.
This is something you need to play with and realize that if you make a mistake, you just undo it or start again with the original raw image. This is not for 'snapshots', but for 'artsy' stuff like old barns, fences, mushrooms and things like that. I use it for photos I enter in competition, but I do not win very often, so there are many better users out there.
R2B