OK... when you're ready to progress, go to the Mortuary and tell the guard at the entrance that you need to get in to see Deionarra's memorial. The portal to the Fortress of Regrets is located at the far end of the room where you originally woke up on the slab. How ironic. Not giving too much away, but your party is about to be split up, so make sure TNO is carrying the following: Bronze Sphere, Blade of the Immortal, Deionarra's Wedding Ring, the kassegs you got from Fhjull, and all the healing charms you can lay your hands on. Check. When you're ready, head through the portal (250000 XP)
I got that from
http://www.sorcerers...rment/index.php Steve's Guide to Planescape: Torment
I hope I won't get my ass whooped for copying that ^^
But isn't another way (two other ways) to get into the mortuary, to go to Pox (a collector that stands near the mortuary) and to 'play deader' or let him actually kill you. Just talk to him if you can't get the first thing to work.