The story is about a woman, Vanna, writing in her blog through the years. Most sequences have her writing an entry about how she met Spider-Man, so to me we have a succession of sequences with Vanna in the main story (or BTS when we don't see her but just have the blog's entry) and a FB with her and Spider-Man.
Curiosly, the MCP has only the FB with the Vulture, and has it as a FB-FB. I don't think there are any FB-FB, the story is just a succession of sequences covering at least 50 years, with some having plain FB.
Archive 69 Thread 7 proposed some placements
Sequence 1 : (1 - 7) Entry #17
Main : Vanna
(3 - 7)-FB : Vanna, Spider-Man, Flash Thompson, Vulture. The MCP placed it just before UTSM '97
Sequence 2 : (8 - 12) Entry #583
Main : Vanna
(8:3 - 12)-FB : Vanna, Spider-Man, Looter
Sequence 3 : (13) Entry #1479from Paul Bourcier in Archive 69
The flashback involving the Looter can be placed easily between pages 11 and 12 of ASM 36, in which Spidey battles the villain in a science museum where a meteorite is on display, just like we see in FNSM 5. Unfortunately, that means that this flashback with the Looter (in September of Peter's freshman year of college) must occur a few months, not a "couple years" after the flashback involving the Vulture.
Main : Vanna-BTS
(13)-FB : Vanna, Spider-Man, Sandman (they fight on a beach)
Sequence 4 : (14) Entry #1621
Main : Vanna-BTS
(14)-FB : Vanna, Spider-Man, Rhino (they fight in a bar). Vanna's blog ends with : "But I think I know what to do."
Sequence 5 : (15 - 16)from Paul Bourcier in Archive 69
I believe the flashback involving the Rhino is the very same battle referred to as having occurred BTS earlier in the day in M/TU3 7 (3-22). That's the last time we know that Peter fought the Rhino (aside from M/TU3 11, but the battle there doesn't match the one in FNSM 5), and this flashback can't occur very long ago because it leads Vanna to go after the restraining order we see in the "current" portion of the story.
Main : Vanna
That's not a blog entry, it looks like it's in the present. Vanna gets a restraining order between her and Spider-Man.
Sequence 6 : (17 - 18) Entry #1622
Main : Vanna-BTS. That's the next entry after sequence 4. The entry begins with : "Well, that didn't take long. As soon as I posted on this blog what I'd done, I got a call from J. Jonah Jameson." [so this entry should be #1623]
(17 - 18)-FB : Vanna, Jonah, Peter Parker. Peter takes a photo of her with the restraining order, that's the front page for the Bugle's next edition.
Sequence 7 : (19 - 22) Entry #15270
In an alternate future, forty years after sequence 6. Vanna meets Spider-Man's widow (presumably Mary-Jane), then begins to write Entry #15270
Vanna doesn't get a listing in the MCP, but it should read :
VANNA
FNSM 5 (3 - 7)-FB
FNSM 5 (1 - 7)
FNSM 5 (8:3 - 12)-FB
FNSM 5 (8 - 12)
FNSM 5 (13)-FB
FNSM 5 (13)-BTS
FNSM 5 (14)-FB
FNSM 5 (14)-BTS
FNSM 5 (15 - 16)
FNSM 5 (17 - 18)-FB
FNSM 5 (17 - 18)-BTS
SPIDER-MAN/PETER BENJAMIN PARKER
...
UTSM 23
FNSM 5-FB-FB --> CHANGE TO FNSM 5 (3 - 7)-FB
UTSM '97
...
ASM 148-FB
ASM 36 --> CHANGE TO ASM 36 (1- 11)
FNSM 5 (8:3 - 12)-FB <-- ADD
ASM 36 (12 - 20) <-- ADD
MARVELS 3 (32 - 33)
...
SSM2 10
ASM2 56 (17:4 - 18:4)-FB-BTS
BP3 52
FNSM 5 (13)-FB <-- ADD
SMTGLW 21
...
ASM 515 (16 - 18)
FNSM 5 (14)-FB <-- ADD
M/TU3 7
M/TU3 8-BTS
...
SENSM2 28-FB
FNSM 5 (17 - 18) --> CHANGE TO FNSM 5 (17 - 18)-FB
ASM 529
...
VULTURE IV/ADRIAN TOOMES
...
ASM 18
FNSM 5-FB-FB --> CHANGE TO FNSM 5-FB
ASM 48
...
THOMPSON, CPL. EUGENE "FLASH"
...
[V2 27.1-FB]
FNSM 5-FB-FB --> CHANGE TO FNSM 5-FB
UTSM '97
...
LOOTER II/NORTON G. FESTER
ASM 36 --> CHANGE TO ASM 36 (1- 11)
FNSM 5 (8:3 - 12)-FB <-- ADD
ASM 36 (12 - 20) <-- ADD
M/TU 33
...
SANDMAN II/WILLIAM BAKER/"SYLVESTER MANN"/"FLINT MARKO"
...
PPSM 57
FNSM 5 (13)-FB <-- ADD
SH 5
...
RHINO/ALEXSEI MIKHAILOVICH SYTSEVICH/"ALEX O'HIRN"
...
SM:BREAK 3-FB
FNSM 5 (14)-FB <-- ADD
M/TU3 7-BTS
M/TU3 11
...
JAMESON, JOHN JONAH JR.
...
M/M:FFF
FNSM 5 --> CHANGE TO FNSM 5-FB
FNSM 6
...