FinalyI have ready (or i think so) the SVN server for the game i'm working on currently.
The chekcout should work with this :
    mkdir versusrx
    cd versusrx
    svn co 
http://87.216.217.107/svn/versusrx .
Editing needs authorization (or it should).
User:
versusrx
password:
raydium
 
Notcie me (vicente at guadagames dot com or at the raydium forum)  if something fails.
 
Also you need to download the media package. You can get it from here:
http://www.guadagames.com/versusrx/vers ... -11.tar.gz
Once downloaded, extract it in your local copy of versusrx.
 
One more thing:
You need to create a soft link to your usual raydium folder.
For example:
    cd /home/user/path-to-your-local-copy-of-versus
    ln -s /home/user/path-to-raydium/raydium raydium
     
 Also you can delete the raydiumlib files and put your own updated ones.
Keys:
The cursors will move the character
p will shoot (but there is a bug and segfault around the 16th shoot)
shift+d will switch debug mode
Those are the important ones.