@dertien, Sorry there has been no reply. Its greeat that you are trying to do such a thing. X3TC 1.2 was a release to let people see what is coming. The 2.0 is a knock out compared to 1.2. I have not tested 1.2 for a long time but can not remember if there was ATF in aldrin space or even in Terran space, but they are in Terran space and more of them.
If you are thinking to have more to in game to board or cap, you might find that 2.0 will give you just that. IF you are trying to fill the viod of missing ships to make them feel more active, aldrin sectors will be awsome when you get to 2.0.
Last note, knowing that 2.0 one must start a new game since 1.2 has many add ons and changes, if you make the changes in 1.2, they might not work or conflict with 2.0 if you are making a script to carry over to 2.0.
I am not privlaged to point out details, but you might just want to wait and see 2.0. However I am not discourageing you to NOT dabble in scripts, actually go for it to better yourself and maybe add stuff later as mod scripts.