Well, as you see the ZIP isn't correctly packaged, please fix that too.
The whole ".DS_Store" directory should be removed - it bloats the ZIP, nobody needs those files - and the duplication of RTF and HTML is also over-the-top, I'd suggest only a TXT would be sufficient, but if you really must have styling: go with HTML!
See the packaging guide for details on how to package it "the right way".
Installation should be as simple as extracting the ZIP directly into your AC-home-dir - what you described in your How-To looks like replacing the default CFG, that is a bad idea! Look at this Where's My Game Home-Dir? - for AC this is basically the same, just on *nix (Mac, Linux, Unix, ..) it'll be "~/.assaultcube_v1.0/". If people then want to remove your script, they just need to delete the CFG from "~/.assaultcube_v1.0/config/" and need never worry about keeping a backup of any original files, which you never mentioned either.
RE: Chaseter : just ignore him, I can see nothing wrong with your CFG and he didn't get that skull for nothing ;-)
BTW: I'm really not sure about all those green lines, seems like a waste of space and will require people to do a good many more key-clicks until they have the option they wanted.