I've been using a Pronto (actually a Marantz RC9200 colour) for about 4 years. I've got Sky+ in my ccf, but I only use the basic functions:
Power (using "activity" macros)
Channel up/down (using hard buttons)
All the other stuff is in there, but I've never bothered creating decent buttons. The reason? The original Sky+ remote is the best remote layout possible, a real triumph of user-friendly design. Trying to replicate it with a Pronto is impossible.
I use 2 remotes, the Pronto and the Sky+.
If you want, I can email the ccf to you.
All Sky+ remotes are basically the same. The codes are the same, but the firmware in the later remotes is different - more TV codes, and the ability to control AV amps.
The problem with finding a ccf on remote central is that it's an American site, and Sky+ is a British product.
You might find something, so it's worth looking. I couldn't find anything when I looked, but that was a couple of years ago.