Its Axl, Ulrich, Slash, Sebastian Bach and James Hetfield joined them for a few songs during the set
It was performed in 1990 for the record companies birthday, or some record gathering, and its the same reason Metallica originally covered the Queen song 'Stone Cold Crazy'
It was a big event at the time and they performed a series of covers and GNR songs, and Queen covers, but I don't think they performed any Metallica
They went under the name of Drunk Fuxx I believe for the occassion
They did perform a metallica track,whiplash i think but it was baz on vocals.