Use GenPatcher (https://legi.cc/downloads/genpatcher/) to make the original game work basically perfectly on modern OSes, as well as implement a bunch of stability, balance, and other optional fixes.
This. I think part of the reason an OpenCCG hasn't shown up is because the modding/community support for the original CD images/binaries is so strong. Plus... the game isn't exactly hard to find (it's on Origin, for example) and isn't exactly hard to find (if you know what I mean).
Generlas is a very picky game, with random mismatch errors all the time on windows, even as a linux gamer I've given up on running it on linux, it has enough issues as is!