First, I want to thank this community for making CMS made simple availible, it sure has made my life a lot easier!

I tried finding an answer to my question searching the forum, but was unable to find it. I apologize in advance for asking this question if I've somehow overlooked the answer.
I recently upgraded from 1.5.2 to 1.5.3 to 1.5.4 using the full-diff packages, overwriting the files. Everything seems to be working fine. However, in the admin console I got a warning stating I should remove the install-dir. There is a install-dir present, which I removed after making a backup and everything still seems to work OK. However, the install-dir did contain a couple of language-files and two sql-files (extra.sql and initial.sql). I've tried finding instructions on what I should do with these files, but was unable to find them.
I gathered from another forum post (http://forum.cmsmadesimple.org/index.ph ... 928.0.html) that the ugrades I applied where file-upgrades only and no db-upgrade was nessesary, but it would have been nice to have had a readme-file present in the upgrade packages that actually confirmed this.
So my question is: with future upgrade packages, could you include a readme-file with instructions on how to perform the upgrade, even if they are as simple as "just overwrite the files"?
Thanks in advance!
Sushhh