Instructions on how to upgrade the player firmware are here. Please give a skim through the whole FAQ while you're there, too.

Chances are, before adding hacks and such, you will probably want to upgrade to version 2.0 Beta 11.

Answers to questions about third party software and hacks can be found here. Chances are, the most important hack your'e looking for is Hijack, and a link to it can be found at the top of this page.