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.
28/8 Chantel McGregor
10/9 Ricky Warwick
18/9 Theater Equation