Thank you for answering, Chrysalis. Just a couple of hours ago, I found a solution! I'll post it here in case someone else will run into this problem.
I had to turn OFF the Resize Project in Field Models. I liked that mod, it made characters look better. I hope they'll improve it one day to solve this issue, as it's really a beautiful mod. I think it crashed during the Shinra HQ because whenit was causing some confict.Spoiler: show
[00000700] TRACE: 5E5A202C (FFNx): (filename not available): EAXDirectSoundCreate
[00000700] TRACE: 00419738 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 00913C60 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 00913C94 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 0070B807 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 0070CBDE (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 0070CFDA (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 006CB872 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 006CDB72 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 006CC73A (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 0067DD90 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 0040B832 (FF7): (filename not available): (function-name not available)
[00000700] TRACE: 75DA336A (kernel32): (filename not available): BaseThreadInitThunk
[00000700] TRACE: 779E9902 (ntdll): (filename not available): RtlInitializeExceptionChain
[00000700] TRACE: 779E98D5 (ntdll): (filename not available): RtlInitializeExceptionChain
[00000700] ERROR: Unhandled Exception. See dumped information above.