Another nicely reasoned timeline, Lawman. I won't debate the specifics, but I'll take this opportunity to mention a couple things I have observed (or questioned) in recent weeks.
The Green Arrow arc is a bit confusing. The bulk of the story (from the end of GA 52 onward) covers a single 24-hour period with no breaks, and, as Lawman says, it must occur after IC. However, issue 52 also includes a scene on the JLA Watchtower that must be pre-Sacrifice, and issue 53 includes references to the JLA that strongly suggest the story is pre-Crisis of Conscience. But the preponderance of evidence requires a creative explanation for those JLA references, as well as a (somewhat illogical) multi-week gap between the Watchtower scene in issue 52 and the end of the story. I suspect that the decision to place the story post-IC was made late in the arc's run in order to allow Winick the opportunity to end on a cliffhanger without disrupting GA and Speedy's appearances elsewhere.
Now that Rebirth [edit: Recharge] is over, has anyone read it? (I only read the first issue, and scimmed the last couple pages of the final issue.) Does it give any indication of the amount of time that passes? The story appears to be intended to take place somewhere between the first issues of RTW and IC 1. (Note that Guy Gardner is on OA in IC 1 (and GL 7), and he doesn't get there until Recharge 1; Also, Rayner references his meeting with Captain Comet in Recharge 1.) It is difficult to place the Polaris scene in IC 1. It could take place between pages in Hawkman 48 (which is continuous from RTW 6 and Hawkman 47) or it could take place as late as moments before the arrival of Donna Troy. The repetition of dialogue among RTW 6, IC 1, and RTW Special further confuses this placement, as each story appears to depict the characters' first encounter with the spacial anomaly. They seem to take place within moments of each other despite the fact that the Hawkman issues show that days must pass between them.
At any rate, the scene on the Watchtower in Recharge 1 must be apocryphal.
Also, I have trouble placing GL 9 during the Crisis. (Note that Bruce and Ollie appear to be on speaking terms, per Hal's comment - something that didn't happen until IC 6.) I suspect the story takes place immediately after the Crisis, but before Batman leaves for his year-long world tour. I assume IC 7 will show us whether such a thing is possible or not.
I also have held back on placing the final issues of Gotham Central. Due to the absence of Dealdy Sins floating around Gotham, I believe that they must take place at least a day after the Day of Vengeance Special (with the IC scene of the Spectre being placed in Crispus Allen's body taking place out-of-sequence). But I must go back to see if there is enough time to force those issues in between DOV Special and the Spectre's appearance in IC 6.
Although I posted differently elsewhere, I agree that the Titans Annual requires that the Chemo/Bludhaven battle (shown in Adv 648) must take place over the course of an entire day. This is good, however, as it gives both Dick and Lupe Leocadio more time to recuperate, and it answers the question of what Superman was doing during the Superboy battle.