RAW should not be identical to in camera jpegs. With jpegs, you basically let the camera handle all the processing for you. With RAW, you get exactly what the sensor recorded, ready for you to tweak to your liking. They will naturally look rather flat and dull on their own. There is nothing wrong with shooting jpeg if you don't like post-processing.
I can't help but think that Olympus Viewer 2 is going to behave as any other RAW editor. An unedited RAW file will not be the same as the in camera jpeg. [/url]