Hmmm, the PDF generation in the program uses PHP (a web server technology) to create the PDFs, so it would require some serious arm-bending to create a "portable" version. I agree it would be very cool, so I'll keep my eyes open for alternative paths....downloadable version of the 0-level generator?
On a more positive note, I'm close to announcing the release of a massive update to the "Funky Dice Roller" (now re-branded "The Crawler's Companion") that in many ways turns the program into "DCC RPG on the go". It's designed from the ground up to work on tablets/mobile devices, at least eventually. (There are some serious fiscal hurdles in making it available/testing it for devices other than what I use for development (my Kindle Fire), especially on the iPad side of things, but I'm weighing some alternatives...)
It's an exciting time!