Need assistance setting up old iMac as music server

I have got an old imac that I would to use for music storage and possible streaming. I'm a little stumped as to which cables I would and if I would need to stick with ieth SnowLeopard or Windows 7 on my laptop and just windows 7 on my desktop.
As I'd like most likely be able rotate the music would it better to only upload a small portion at a tie?
I'm currently running panther on the imac.
It still fully functional.
