Minidumps after 45-60 minutes.

Ok.   Heres what's happenning.   Playing single player and multiplayer, at or around 45-60 minutes into play on a random map, I crash with a minidump.   This is happenning consistantly.   I am running 1 mod, the Mad Scientist 1.51 (2.0) release, easily found on the modding forums.   What I am trying to figure out is wheather this is a mod issue, a game issue or a computer issue.  

Here are my specs:

vista 64

QX6850 proc

2x GeForce 8800 Ultras (drivers updated last night to 182.06)

4gb ram

Raptor HD

Here is what windows says about it:

Problem signature:
  Problem Event Name:    APPCRASH
  Application Name:    Sins of a Solar Empire Entrenchment.exe
  Application Version:    1.0.1.0
  Application Timestamp:    49a5e2fc
  Fault Module Name:    nvd3dum.dll
  Fault Module Version:    7.15.11.8206
  Fault Module Timestamp:    4990b8e1
  Exception Code:    c0000005
  Exception Offset:    002151df
  OS Version:    6.0.6001.2.1.0.768.3
  Locale ID:    1033
  Additional Information 1:    86b3
  Additional Information 2:    aa9c23950a78be8f88fc8ac4692cd059
  Additional Information 3:    dca1
  Additional Information 4:    91f4ffd4891c2928beb42d41ec1f6d5f

Not sure how to find or post the minidump data.  

I would appreciate any insight or help you could lend.