I'm so glad I can help! And I love to see these rare pics!
1) This is not Stevie! It's Lindsey's girlfriend at the time, Carol Ann Harris (they do look alike), so that explains the romantic overtones. Lindsey and Carol dated from 1976 untill 1983 but based on Lindsey's facial hair I would say this photo is from 1976 or 1977.
2) the girl with Mick is his wife at-the-time Jenny Boyd (model and sister of Patti Boyd, famous wife of George Harrison and later Eric Clapton). I think the photo is from 1976 or thereabouts. I have a screencap of this photo (
http://goldduststevie.tumblr.com/pos...nny-boyd#notes) so it was probably used in some documentary, I can't remember which one, maybe Fleetwood Mac: Behind The Music or The Mick Fleetwood Story?
3) this is from that same photoshoot from February 1975, it is used for the 2004 re-issue of the 1975 album and has since been published in several magazines.
4) indeed some variations of a shot that's been used a million times (2nd row, far left on the contact sheet). It's backstage during the 1976 tour and the tall blonde guy that can bee seen in a couple of the frames is John Courage, their tour manager.
5) yes, these shots ended up on the back of the Rumours album.