Modify Epilogues?

Hello all, I'm hoping somebody is able to help out here. I just started a game (couldn't find my original CDs, so I bought the EE) and I immediately remembered how depressing some of the Epilogues are. I've hated BW's penchant for having nearly no happy/satisfying epilogues to games they're involved with for some time now and I'm really hoping there's a way to rewrite these. I know certain mods that include new characters include custom epilogues and that it was possible in BG2, so I'm hoping somebody can point me in the right direction. I apologize if this has been covered before, but I searched through the forums and didn't find anything relevant.

Thanks in advance!