Hello!
Edwin mentions the nether scroll after I develop our romance a bit, so I obligingly I head to the cemetary, kill Nevaziah and loot the body. My understanding is that Edwin is supposed to say something about having obtained the scroll at this point (but he bugs the game if I suggest that it is "party loot"... Edwin is supremely powerful like that I MUST ROMANCE HIM). Anyways, this isn't the case; he doesn't mention the scroll ever again.
I've continued questing for several in-game days and still no mention of the scroll/Edwina transformation. I've gotten as far as the Underdark. I probably shouldn't have waited so long before looking into this problem but I'm a forum noob and I find this whole troubleshooting process somewhat intimidating. I'd appreciate any help!
PS: I tried attaching some game save files but I don't know how. Copy/paste and dragging the files didn't seem to work, so I guess I need help with that too >.< (SORRY)