Vista Ultimate 64 Bit BSoD

Hi guys, i've been getting some BSoD issues with my system. The parts are kind of old, I will admit, but I have updated all the drivers such that they should support 64 bit vista, as well as all the bios chipset updates. I get BSoD about every few days, so I'm not sure whats going on. I assume that if it were a huge driver issue, I would BSoD more frequently, but it seems to only have once every several days. Also, it seems to only happen when my computer wakes up from Sleep mode. But I have tried the solutions I've found on several forums--none of which seem to work for me. If anyone who is much more knowledgeable about this issue than me could lend me a hand, that would be much appreciated.

Here is the error information:

Product
Windows

Problem
Shut down unexpectedly

Date
2/16/2009 7:33 PM

Status
Report Sent

Problem signature
Problem Event Name: BlueScreen
OS Version: 6.0.6001.2.1.0.256.1
Locale ID: 1033

Files that help describe the problem (some files may no longer be available)
Mini021609-01.dmp
sysdata.xml
Version.txt

Extra information about the problem
BCCode: a
BCP1: FFFFF88007CAB040
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFF80001CF96F2
OS Version: 6_0_6001
Service Pack: 1_0
Product: 256_1
Server information: d45f0fad-f9e3-4ec4-94fe-578edcb9d4d8


System:

Pentium D 935 3.2ghz
ASUS P5NSLI
4 gb OCZ PC5400
Nvidia 7950 GT 512mb.

Any insights would be greatly appreciated

hey you gianormus *******, don't you think i tried?

if you don't have anything useful to say, f-off yeah?

this is why i was hesitant to join a forum to try to resolve this issue.