Stronghold Crusader Revamp?

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Alrighty, so sometime ago, I don't know when, but I was quite young and was gifted a CD of Stronghold Crusader. My child mind wrapped itself around this game as it grew out of playing with Legos, and enjoyed the constant blast of visional stimulus coming from a screen. What I didn't know at the time is that the CD had completely loaded all of it's contents onto the family computer. Throughout growing up I always came came back to having phases of playing the game, copying the game folder over into USB drives from computer to computer.

At this point the game seems very easy to me, but not only because I've been playing it for way too long, but the AI seem to be buggy. If you aren't familiar with the game, it's an older RTS game set in the time of the Crusades (Kind of like Age of empires). So the problem is that the AI just aren't challenging, and get stuck in a loop that leaves them being absolutely useless pimples on the map. I'd like to change that and would appreciate any pointers.

tldr:

I have an old version of this game, and I'm wondering if there's a way of accessing the back end of the code to study it, and maybe find a way to make improvements.