http://imagemodserver.mine.nu/other/MM/SE4/Mods/B5mod/
This is for the 1.8 big version, then
http://www.shrapnelcommunity.com/thr...?Number=392169
for the latest data/AI files.
Two things you should do, until a patch arrive, is to delete the Shadow_AI_Reasearch.txt for the Shadow race(SE4\b5mod\pictures\races\shadows), since they don't do any research, and change the supply usage for all the engines in the game to something low, like 5. You can find that in the components.txt file(SE4\b5mod\data), and just do a search for fission engine, then the rest of the engines will be just below it.
The number you're supposed to change is: "Supply Amount Used := X" to "Supply Amount Used := 5" on all engines.
Not really necessary if you don't wanna go through the work, but if you don't the AI will be very passive and barely move its ships at all.