Vanilla 1 is no longer supported or maintained. If you need a copy, you can get it here
I'm sure I have seen posts on this before, but I can't seem to find the right thing to search for.
When I installed Vanilla 0.9.2 I modified various bits of text, e.g. the welcome guest message, by searching through the English.php file for the old text and replacing it there and in some other files (e.g. apply.php). I knew it wasn't the best, but I wanted to get started, and I knew it would all change when v1 appeared.
Of course I lost all these changes when I upgraded (just this weekend) to 1.01. So my question is, are there any do's and don't's for making such changes, especially so they'll be retained though any future upgrades?