Freebird was Gary Rossington and Alan Collins. Van Zandt was just the singer.

Rolling Stones "Dead Flowers" (Mick Taylor)
Beatles "Something" (George Harrison)
Thin Lizzy "Whisky In The Jar" (Eric Bell)
Guns N' Roses "Sweet Child O' Mine" (Slash)
Guns N' Roses "Novemeber Rain" (Slash)