I would suggest the unknown cover is Riff Raff, and where you've got Riff Raff they actually did Whole Lotta Rosie. Both AC/DC covers, obviously.
Good to see yet another person actually able to watch a GN'R show for the great show it is.
27/4 Dan Patlansky
3/5 Maiden United
7/5 One Machine
8/5 Blaze Bayley