ok, I've been playing with DPP, converted it to 8 bit .tif (output resolution 100dpi) then sharpened the .tif version - but baring in mind that the DPP has 2 options - the RAw image adjustment and the RGB image adjustment...I'm only using the latter (obviously, with me no longer working on the raw image)...and yup, you've guessed it...! - it's not much better than the jpeg...
original pic (jpeg) here -
and modifed jpeg here -
shame that these aren't as sharp as the raw image tho...