Last couple of days, I've been having a lot of CTD's after 20 minutes or so of play. I downloaded and installed Thomsen Soundpack V3 a couple of days ago while I was in port along with a couple of other mods.
The first time I played afterwards, I seemed to have no problems for about an hour or so and had to exit normally. (Great sound effects, by the way...great mod!!!

)
Yesterday, mid patrol, I started to have multiple CTD's after about half hour or so of play. A couple were only after 10 minutes or so. I got pretty frustrated and did the cardinal sin of disabling Thomsen Sound Mod but I had the same problem.
Before now, I normally can expect a CTD after about an hour or so, but sometimes I can go 4 hours or more before a CTD. I've come to expect and do tend to save a fair amount of time. I just think it might be my computer. It is old and we bought it used from my wife's work for a good deal. It is by no means top of the line and does it's job. I've done a little upgrading(new graphics card and upped the RAM) and it works well with other applications.
Now for the meat of this post:
One thing I've noticed is most of the time that the game crashes, it seems to happen when there is some sound happening(creaks/groans. etc.) and it seems to be stuck on that sound and looping and then I get the CTD.
So I'm wondering if a sound card might be the problem, my computer just is not right for the game, or I have some other issue and the CTD's during a sound loop might be coincidence. I'm stumped.
Can anybody give me any advice?
Sorry for the lengthy post, but I've been pretty frustrated

the last couple of days. I'm thinking of abandoning this current patrol. starting back at port, and disabling Thomsens Sound mod and seeing if that makes a difference. I hate to disable it though, it is pretty awesome, what I've heard so far.
System Specs:
Windows XP with SP2
Pentium 4
2.0 Ghz Processor
1.0 GB RAM
Radeon 9000 Series Graphics card.
Creative Audio ES1371/ES1373 Sound card-came stock with the computer.
I'm playing SH3 with the following:
V1.4b
GWX2.1
SH3Commander
Thomsen's Sound Pack V3
GWX2.1 Mission Orders 1.3
GWX2.1 16km atmosphere
GWX2.1 Lite Harbor Traffic
Thanks for any help.