Well I've been working on a mod that changes a lot of the interior of Dukov's place(removes the 50,000 empty bottles, adds some more beds, fixes up bathrooms, adds bobblehead stand to one of the rooms, a security room/basemant, etc). I decided to use the mod that lets you make your own vault doors or use a blank one(http://www.fallout3nexus.com/downloads/file.php?id=1340). I added a blank door and saved, then tried to test it in Fallout. The game crashed on start-up at the "Please stand by" screen. I tried again, same thing. I closed out the G.E.C.K. thinking that could have been a problem(which I now regret) and tried again. Still crashed. I opened up the G.E.C.K. and tried to load my mod, but it froze and crashed at "Loading Files...Initializing References". I disabled my mod and tried loading the G.E.C.K. without it, the game and the G.E.C.K. worked fine. I enabled it, crashed again. Is there a way that I could fix this without having to start over? I've put a few days' work into the mod and I'd rather not have to start over, and I have no backups from before this. Here's the crash info for Fallout 3

Problem signature:  Problem Event Name:	APPCRASH  Application Name:	Fallout3.exe  Application Version:	1.7.0.3  Application Timestamp:	4a40f18b  Fault Module Name:	Fallout3.exe  Fault Module Version:	1.7.0.3  Fault Module Timestamp:	4a40f18b  Exception Code:	c0000005  Exception Offset:	000239f4  OS Version:	6.1.7600.2.0.0.256.1  Locale ID:	1033  Additional Information 1:	0a9e  Additional Information 2:	0a9e372d3b4ad19135b953a78882e789  Additional Information 3:	0a9e  Additional Information 4:	0a9e372d3b4ad19135b953a78882e789

And the crash info for the G.E.C.K.

Problem signature:  Problem Event Name:	APPCRASH  Application Name:	GECK.exe  Application Version:	1.5.0.19  Application Timestamp:	49bfb0f9  Fault Module Name:	ntdll.dll  Fault Module Version:	6.1.7600.16385  Fault Module Timestamp:	4a5bdadb  Exception Code:	c0000005  Exception Offset:	0002fc47  OS Version:	6.1.7600.2.0.0.256.1  Locale ID:	1033  Additional Information 1:	0a9e  Additional Information 2:	0a9e372d3b4ad19135b953a78882e789  Additional Information 3:	0a9e  Additional Information 4:	0a9e372d3b4ad19135b953a78882e789

Thanks if anyone can help. I guess if I have to I'll just start over, but I'd rather not. I've put a lot of work into it.

Go to your game folder.

\Fallout 3\Data\Backup

In that folder are the last 'saves' of your mod. Pull out the latest one, put it in your Data folder and remove the extension of .bak from it and you can use it.

Thanks! I forgot that it created backups of mods. Now it works again. You've saved me a lot of work.