Streaming music from home while travelling

So I've got a huge amount of mp3s on my family computer, which is always on and I've got a couple of no-ip.org addresses linked to it. What I want to do is to be able to browse the music collection and stream it from anywhere over the internet. So far I haven't been able to find a program that suits my needs, but I'm sure there is one avalible.

Both the "server" and the client are running WinXP Pro (with IIS).

So, does anybody know any applications that I can do this with?

Yes because since it is open-source you can fix it yourself, which is good since there is no support for open-source software.