Added you to commiters list. Are you familiar with mercurial? (version control system) You'll need it to upload the files. (
http://tortoisehg.bitbucket.org/ comes with GUI to do it)
This is the url of wiki repository:
https://wiki.prs-plus.googlecode.com/hg/
If you don't mind using command line, create folder where you want to store it anywhere,
1) press windows button + R
2) execute: cmd
3) cd to the appropriate folder
4) execute: hg clone
https://wiki.prs-plus.googlecode.com/hg/ .
this will get you a copy of the wiki repository
5) edit hgrc file in .hg folder (it will be created by mercurial) and replace:
default =
https://prs-plus.googlecode.com/hg/
with
default = https://<your username>:<project password>@prs-plus.googlecode.com/hg/
(you can find the password here
https://code.google.com/hosting/settings )
6) add /edit whatever files you want
7) execute: hg add
it will start tracking new files
8) execute: hg commit -m "short description of what you've done"
it will "commit" the change localy
9) execute: hg push
it will push the stuff to the global repository
It's much easier than it sounds. The same should be doable via GUI, but I don't know, how it works...