[Aiken]

[Default_AI_Construction_Facilities.txt]

This entry has nothing to do with initial facility's placement on the Homeworld. Actuall order is hardcoded and you can't change it. I belive it follows this rule: 1 Space Port (no SP for natural merchants) + 1 SY + 50% of total empty slots -1 to best research facilities + 1 best oranic extraction facility + 1 best radio exraction facility + remaining amount of slots to best mineral mining facilities.

But if you will scrap all your facilities on the Homeworld and allow AI to rebuild it, AI will follow instructions from the aforementioned section.

Other guesses are right.

[Default_AI_Settings.txt]

As soon as AI's total income from research and/or intel facilities runs up to these numbers it will stop building new research and/or intel facilities.

TDM Mod Pack has a decent AI. Very good compared to stock game.