Will this version of the "Popularity Contest" plugin work on WPMU?

I have a regular WP theme that I am using on my WPMU site. It is working well (now that Host Gator has removed the security setting that blocked Custom Header), but it is designed to use the "Popularity Contest" plugin.

I found a popularity-contest.php script online at http://svn.wp-plugins.org/popularity-contest/trunk/popularity-contest.php and in it I noticed that it had comments about using it in when placed in the mu-plugins folder. To me, that sounds like it "may" be WPMU compatible. But, I aren't no coder.

Would someone take a look and advise me as to whether it will work in WPMU, or alternatively, how to test it without breeaking my site?