All right :)
Let me give you some advice on that. What you basically need to do is to install a WAMP server
(provided you have Windows OS). This will allow you to run a local server. Then you only need to install Subversion
which will allow you to download MArcomage source code.
Massive necro and offtopic, but there are things I'd like to look into sometime, like improving AI and UI. I've worked as a games freelancer, developed front end / back end for 2D and 3D web apps; WAMP, PHP, HTML, JS, SVN familiar skills.