Haha, you should give me your job.
Just kidding.
When you go to the webpagee switch the "http" for "ftp"
it will most likely prompt you for a username and password. I sure hope they gave you one.
Once you log in, it'll show .html, images, and sounds used on the site.
Go to the view menu on your browser, click on something like "view files in windows explorer"
a windows...window will pop up, with the exact files you were just looking at, but instead of links, it's the actual files
homepage is most likely named "index.html". best be careful when replacing file, if you don't use the original names, they will not work on the site.