Open source game client modification

I'd like someone to create a mod for an online game client (the game and the client are both open source). Such ammendments would require some open source revision, and changing some variables/commands. I can provide all details later. The job could be divided into two parts: first one to make some simple modifications and the second one to create the full mod.

I can guide in the project as I know the game and client well, Im just not a coder.