I'm not sure if you're right here, because modulars and moduels don't have anything in common afaik
and modules are normally not purchasable...
G5, isn't that a Mac computer? I don't know how many module players there are and how good they are, and I especially don't know which trackers are available for the Mac. There is a audio library called "BASS" (
www.un4seen.com) which can also be used on Mac systems, but the player itself ("XMPlay") is for Windows only. Now, what is a tracker? Basically, it's a piece of software that can be used to produce music. The most notable difference between a tracker (like MilkyTracker, ModPlug Tracker) and a sequencer (Cubase, Logic) is the direction the music is displayed: a tracker displays your piece of music vertically and a sequencer plays it horizontally. Get more information at
Wikipedia.
Last but not least, Bit Torrent is a filesharing network. You need a Client like Azureus (I'm pretty sure it also works on Mac systems) to handle torrent files. Also have a look at
Wikipedia to find out how it works.