Does it not come with a manual that has images showing how to set the dials for certain souds such as metal, screaming lead etc...?

Most the time things do. I play a bit of everything....acoustic stuff, stuff i just make up thats kinda like the heavyier licks from satriani's album Strange Beautiful Music, like on Mind Storm ...amazing song ;)....i play a bit of everything though. i like his lead too, like in summer song.