Could someone pls tell me how I can get the new music that I downloaded in Limewire to update to my itunes library so I can synch it to my ipod?

*I had a heck of a time already just getting it all compatible with the new ipod...I finally had to remove itunes 7.7 and download an older version- i got it all on the ipod but now I have added new music to limewire and I don't see it in my itunes so I can synch it as well to the ipod. thank you!