If I remember correctly the latest RAW plug in that was compatible with Elements 6 was RAW Converter 5.6. Assuming you are using Windows download from here:
http://www.adobe.com/support/downloa...jsp?ftpID=4626
Then follow the instructions carefully. It was fine for cameras up to and including the Canon 7D. Anyway there is a list of cameras it covers on the Adobe website. If the camera is covered then a shot taken in RAW should open automatically when opened in the Elements Editor. Hope that helps for starters.