If you are starting to collect this from scratch, beware that the issues get more difficult to obtain after Spider-Girl #50.  I recommend starting with the issues at the end of the run (the Amazing and Spectacular series), as well as Spider-Girl #75-100.

Volume 1
-Amazing Spider-Man Family #1-4 (Mr. and Mrs. Spider-Man stories)
-What If? #105
-Spider-Girl #1
-J2 #1
-A-Next #1
-Spider-Girl #2-4
-A-Next #3
-J2 #3 (first story)
-A-Next #4
-J2 #3 (second story)
-J2 #4
-Spider-Girl #5
-A-Next #5
-Spider-Girl #6
-J2 #5
-A-Next #6
-J2 #6
-Spider-Girl #7
-J2 #7
-A-Next #7-8
-Spider-Girl #8
-J2 #8
-Spider-Girl #9
-J2 #9

There are a number of reprints of What If #105, most notably Spider-Girl #0.  It was also reprinted in a Spectacular Spider-Girl TPB, but with resized lettering that I felt looked distracting.

Volume 2
-Spider-Girl #10-11
-J2 #10-11
-A-Next #9-12
-Spider-Girl #12
-J2 #12
-Spider-Girl #½
-Spider-Girl Annual ’99
-Spider-Girl #13
-Wild Thing #0
-Fantastic Five #1
-Wild Thing #1
-Spider-Girl #14-15
-Wild Thing #2
-Fantastic Five #2
-Spider-Girl #16
-Wild Thing #3
-Fantastic Five #3-4
-Wild Thing #4
-Spider-Girl #17
-Fantastic Five #5
-Wild Thing #5

Pay attention to the #12 issues.  They had mini-comics slid into the middle that I may or may not have forgotten to remove before binding.

Volume 3
-The Buzz #1
-Spider-Girl #18-22
-The Buzz #2
-Spider-Girl #23-24
-The Buzz #3
-Spider-Girl #25-27
-Darkdevil #1-3
-Spider-Girl #28-31

Volume 4
-Spider-Girl #32-50

Volume 5
-Spider-Girl #51-84

Beware that some of the issues in this stretch are extremely difficult to find at reasonable prices, especially the ones around #75.  I opted for the Complete Collection Volume 4 TPB to handle the first half of the book.  If Volume 5 had existed, I would have opted for that.

Volume 6
-Spider-Girl #85-88
-Last Hero Standing #1-5
-Spider-Girl #89-100
-Last Planet Standing #1-5

Volume 7
-Amazing Spider-Girl #1
-Avengers Next #1-2
-Amazing Spider-Girl #2-5
-Avengers Next #3-5
-Amazing Spider-Girl #6-7
-Fantastic Five (volume 2) #1-5
-Amazing Spider-Girl #8-19
-American Dream #1-5

Volume 8
-Amazing Spider-Girl #20-30
-Amazing Spider-Man Family #5-8
-Web of Spider-Man #1-7
-Spectacular Spider-Girl #1-4
-Spider-Girl:  The End

The Amazing Spider-Man Family and Web of Spider-Man series were all anthologies that featured other stories along with Spider-Girl.  There are two Spectacular Spider-Girl TPBs that collect all of those issues (along with the Mr. and Mrs. Spider-Man stories used in volume 1 of this map) that might be easier to obtain and bind.