So it's not your PC that's slow. It's the web site.
To make it go faster you'll have to get them to upgrade their servers or more.
When I go to this site to see the files it is delayed for about 15 seconds and says done. After that time it starts to load. I am using Firefox 3.6.14 Is there something in about:config that I can change to make the page load right away. Here is the page link in question.