Well, I thought I had it fixed, but now I'm confused.
It's not related to TSLRCM, or corrupt modules. Looks like it's just Windows.
I reinstalled 1.0, and loaded up my save, and got the same crash to title screen.
Then I tried using XP SP3 Compatibility mode, and it worked and proceeded to T3-M4.
Thinking I had it taken care of, I upgraded KOTOR2, and installed TSLRCM, and used the same compatibility mode settings.... but... same problem.
Does TSLRCM work with the 1.0 exe? I wonder if going back to 1.0/no TSLRCM, getting to T3's scene, saving, then upgrading and going back to TSLRCM would work. This is getting a bit too convoluted though.
I've spent several DAYS now fiddling with settings. I've been meaning to play TSLRCM for a long time, and this new version seems like a great time to actually do it, but now nothing works! Argggh....