I recently completed a 4L60E to NV4500 swap in my 2003 GMC Yukon XL. It took me years of periodic research to gather all of the necessary information before I started my swap. I decided to do the world a favor by creating a comprehensive Swap Guide. Naturally there's a whole section on using HPTuners for the PCM-related portion of the swap. The other sections deal with mechanical, electrical and hydraulic content.
Enjoy!
10 Aug 23 Update: Swap Guide updated with additional information. Now sitting at 23 pages of swap goodness!