I've just made a test build of the latest development code: 
megaglest_win32_r3169_bin.7z. This 7-zip archive contains the following files only:
   Date      Time    Attr         Size   Compressed  Name
------------------- ----- ------------ ------------  ------------------------
2012-02-11 01:42:42 ....A         2355      8516129  glest.ini
2012-03-17 16:20:19 ....A         1017               glestkeys.ini
2012-03-22 02:44:05 ....A     53382144               megaglest.pdb
2012-03-22 02:44:42 ....A     15100928               megaglest_editor.pdb
2012-03-22 02:45:49 ....A     21122048               megaglest_g3dviewer.pdb
2012-03-22 02:44:14 ....A      7699456      3242788  megaglest.exe
2012-03-22 02:44:49 ....A      4350976               megaglest_editor.exe
2012-03-22 02:45:53 ....A      5226496               megaglest_g3dviewer.exe
------------------- ----- ------------ ------------  ------------------------
                             106885420     11758917  8 files, 0 folders
So these are just the executable files, nothing automatic, no installer. And if you want to use it you need to know how to use it cannot explain it in a way which will work for everybody.
Basically the process is that you make a copy of your entire existing MegaGlest installation, then extract the contents of this archive into the copy of your MegaGlest directory, overwriting the existing files.
Another option which saves disk space is to unpack this archive to a new directory, rename all files so that they have a distinct name, such as megaglest.exe -> megaglest_r3169.exe etc., then move them into your existing MegaGlest installation directory, next to the existing megaglest.exe etc.
If you would like to play a test game with this revision, please let me know. This development build contains an early version of the (can I say awesome?) upcoming savegame feature. It also fixes several bugs.