Hi PS,
I have been interested the this method since I obtained my S3. Sometime last year I downloaded the instructions and files to do use the method. After a few false starts I had a fair degree of success 1st using the example file and then my own.
The method makes extensive use of DCRAW
There is also a description of a 3 stop technique using photoshop (it works ok with PSElements) and relies on making a mask to smooth the overlay of the two images.
Because both methods require a 16 bit working space to perform the overlap/masking correctly I was prepared to wait for the final version. Since last November its been 'Coming Real Soon' but have recently trying to learn the ins and outs of PhotoLine using PSE plugins to get a 16bit mask working and repeat the 3 stop method without the 8bit limitation!
I can probably find the original details if you missed them.