In the last year or two, I have picked up a lot of little techniques to mod many aspects of the game. Occasionally people ask me for advice (even though I am still a rank amateur), and I try to help. But rather than answer this question here, that question there, etc., I thought it would be nice to publish a FAQ-style thread with lots of tips and stuff. The goal is, people can pick up this code and drop it into a mod they are working on, rather than having to reinvent the wheel. Every mod is individual and involves individual effort, but say someone want to make stat-based kit effects; I can at least help you drop in to code for handling opcode 326 and splprot.2da, and then you can focus on making whatever cool effects you can imagine.
There will be no particular order for this stuff; I'll publish what I can, when I have time, if the mood strikes.