When i pick a song on frets on fire some songs only have a choice between playing the bass or guitar. But, others have the option of Lead, bass or guitar. Can someone tell me the difference between lead and regular guitar?

okay sorry about that.
thanks for your help

i need the link for the latest ALPHA version of FoFiX..i need it badly, really REALLY badly lol
so if you know where to get it please help im a noob lol

the album covers dont show up for the rock band DLC i have in my library
what am i doing wrong??

Song database say's theres a Rock Band Mega Pack for download but the link just says "The requested topic does not exist."
whats up?