As the Steam sale was on, I decided picking up Honest Hearts and Dead Money would be a good idea. However, since Steam has installed them I can no longer load any of my save games to play these DLC's.

Whenever I attempt to load a save game it comes up with this error:

Problem signature:
Problem Event Name: APPCRASH
Application Name: FalloutNV.exe
Application Version: 1.3.0.452
Application Timestamp: 4daf4b02
Fault Module Name: FalloutNV.exe
Fault Module Version: 1.3.0.452
Fault Module Timestamp: 4daf4b02
Exception Code: c0000005
Exception Offset: 00059e63
OS Version: 6.1.7600.2.0.0.768.3
Locale ID: 2057
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789

I have been searching these forums and others, but cannot seem to find a fix. I HAVE tried starting a new game, then loading after leaving the doctor's house (New Games seem to work just fine). I HAVE also tried re-installing the game twice, then loading on all the mods I had been using.

My DxDiag is as follows:

------------------
System Information
------------------
Time of this report: 7/5/2011, 17:08:43
Machine name: n/a
Operating System: Windows 7 Home Premium 64-bit (6.1, Build 7600) (7600.win7_gdr.110408-1633)
Language: English (Regional Setting: English)
System Manufacturer: System manufacturer
System Model: P5Q-PRO
BIOS: BIOS Date: 06/12/08 01:01:23 Ver: 08.00.14
Processor: Intel® Core™2 Quad CPU Q6600 @ 2.40GHz (4 CPUs), ~2.4GHz
Memory: 4096MB RAM
Available OS Memory: 4096MB RAM
Page File: 2906MB used, 5281MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 11
DX Setup Parameters: Not found
User DPI Setting: Using System DPI
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7600.16385 64bit Unicode

Any help someone could provide me with, would be greatly appreciated.