I've released the random background for the main page plugin. This is a slightly advanced plugin, but is not difficult to use.
What does it do?
It places a random image into the background on the main page of your site.
How to install?
Download and add the plugin into your /ndxz-studio/site/plugin folder.
You need to edit your template in a text editor. Replace the 'backgrounder' plugin with:
<plug:ndxz_rand_bg folder_name,tiling />
folder_name: name of the folder which holds your images (you need to use ftp to place them).
tiling: 'true' for tiling...'false' for no tiling (big images).
Save your changes, test it. Be sure you have the name of the folder correct.
This is a slightly experimental plugin. If it does not work the first place you should check is on the name of the path to your images folder. Some servers may have difficulty finding this folder...if this is the case, use a hard-coded path.
Download @: plugin.ndxz_rand_bg.php.zip