If you don't want to go into the source, but still need a more attractive index page, there is a simple alternative.
1. Go to your sitemap.
2. Install new subfolder on /main.
3. name = index (or any other description that makes sense to you)
4. select page module.
5. Create a html page in your editor and voila...
You end up with an index page, embedded in the ACS environment, which can easily be updated by clicking the edit link . here's how it http://snorri.mine.nu/index