Help with .cre file creation

I am trying to make a mod for BG1 and 2, but for the life of me I can't figure out how to make a .cre--even if I use an npc's .cre as a base! I'm using whatever was the newest Near Infinity in June (no idea if it's been updated since) and the program just confuses me. Some of the things I can figure out easily enough (stats, colors, sprite, class), but I have been running into a wall trying to figure out how to give her proficiencies because the only proficiencies I see in even a new, blank .cre are the original ones from non-EE, non-modded BG1. Not even ChatGPT can make an idiot-proof enough guide from whatever it dredges out of google to walk me through this.
What's frustrating is that I *know* I did this once like 15 years ago, the first time I tried to get into BG modding and I was able to create a very simple .cre for a joinable companion but now I couldn't tell you how I managed it if you tied me up and waterboarded me.
At the risk of sounding melodramatic, someone please help before I give up on ever creating a mod for this game again.
What's frustrating is that I *know* I did this once like 15 years ago, the first time I tried to get into BG modding and I was able to create a very simple .cre for a joinable companion but now I couldn't tell you how I managed it if you tied me up and waterboarded me.
At the risk of sounding melodramatic, someone please help before I give up on ever creating a mod for this game again.
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( with NI you have to manually add the correct proficiency and amount of points in a certain way, there is no "default" proficiency line if im not mistaken)