To post a file they already require you fill in the "readme" section of the mod listing. Which For my mod was 100% unnecessary. So I just put in some lame text. If I had to put a readme inside my file also, believe me, i'd put in even lamer text. Because it's just a waste of time when all you do is install the thing and go. Not every mod has a billion configuration options, so not every mod requires a readme.