That's the link to the ACe mega codec pack...it's what i've been using for quite a long while and I've yet to find a film clip, dvd rip, divx file or any sort of sound/video media that it hasn't been able to load and run.
Make sure your virus checker is runing (just in case), then download the file and install it.......it's just under 50 meg so it's big but like I Said, it's very very effective for those 'obscure' files
In answer to your questrion though, click on one of the mitrrored links in the big boc near the top of the page...that should get you to somewhere to download the file itself.