Patch 1.5 files and new .pack file

[uken]

Hello. I have No-Steam Empire TW. I have installed cumulative patch 1.5 with included Warpath Campaign. When I installed it (with following instructions!), I saw that version of Empire has been changed to 1.5, Artificial Idiot (AI) became good, but add-on did not turned on. I changed both files from campaigns\main from original to vanilla. What a miracle! Add-on worked correctly! I started modding. First I made some changes in strartpos, then I edited main.pack and some patch.pack files in db section. Oh no! Add-on disabled! And all changes were not appeared in game. I made my own .pack. In custom battle game crashed when I tried to select Artificial Idiot (AI) country, without it battle downloaded and played good. I have 3 (three) questions:
1) Which of 6 data .pack files (main, patch1-5) I should to edit to see changes in game?
2) Why add-on has not worked properly?
3) Why I couldn't make my own .pack working? It's OK with user.empire_script.txt.

[The Holy Pilgrim]

A "No-Steam ETW?"

That's really odd, considering even if you bought the disk (I did), it still installs the game onto your steam account.

[uken]

I did not bought disk yet (but only yet, soon I'll recieve my little salary and buy ETW Special Forces).
I have downloaded this patch again (it is in quick server) and changed all .pack files. Add-on works, but when I try to select the highest AI level - KSoD and crash.