I'm new to limewire and don't know much about how to use it. Once you download a song from limewire, how can you access it from your monitor (not from limewire)?

This depends where you choose to save downloaded files. You can either ;

go to the library tab (within limewire) then click on explore which will open the folder that limewire has downloaded your files to or

Go to tools (top toolbar) then options within the new window that opens click on saving and you can change the location of saved files (dont change this whilst downloading it will interupt your download)
hope this helps

Awesome! Thanx so much.