After a bit of scrounging around, I’ve managed to find a program that will build an installation package for my game, Excelsior Installer.
This program should, for the time being, be able to cover my basic needs for an installer/patcher system. While this doesn’t mean anything to most people, it does mean that I will be able to distribute updates to my beta testers using smaller files, and also allow any savegame files that they may have to carry over.
A special “Thank you” also goes out to Tsukihime for their Data Patcher script for RPG Maker VX Ace. All that remains is to create a patch, and begin field-testing.