Limewire will be releasing a new Limewire in a while that lets you connect to and download torrents as well.

Until then I personally use Both Limewire for single files and Azureus for torrents

Using Limewire I can think of two threads (Guides) that should quickly help yu get into using Limewire well

1. Viruses on network you should be aware of!! (Link)

2. How to find music (Link) applies to other stuff as well. And it works well (made it myself )

and maybe 3 as well

A few things to consider while configuring Limewire for optimal performance... (Link) Just the first few posts