Guitar Hero - new boy - getting new songs

[rac]

can anybody out there talk me thru - literally step by step - what a uk user needs to do so he/she can download songs for wii guitar hero that dont exist on the discs that i have. i have guitar hero3, guitar hero5, world tour and metallica versions eg 4.
Help!!!!!!!!!!!!

 

[rac]

ha ha ha. on this occasion no. there are 2 adults, 3 kids and 4 dogs attempting to make sense of the newly acquired WII and guitar heo suite.
specifically how to bget more Nirvanna, Snow Patrol, Cold Play, Oasis, Killers and if at all possible the legendary whilst soemwhat 1970s ELO!

 

[spyro king]

4 dogs and a wii?! 0__________o