Never apologise for offering help and advice, Julian, as it's up to the receiver what to do with it. I've just started a new thread where I used the Auto Sharpen feature in Elements:
http://realphotographersforum.com/forum/threads/lens-distortion.17161/
But I use SPP as well as Lightroom 4, as well as Elements and Nik filters - plenty of possibilities for fine-tuning sharpening. I must watch a few of the Nik tutorials on it, as that allows me to easily highlight one thing (e.g. an iris) and sharpen it or otherwise. But the files from the DP1 seem sharp enough already, and the danger is to overdo it. One of the problems is that SSP doesn't allow 100% viewing until you've converted it, so I've learned not to add sharpening there...