BSOD while playing Dragon Age Origins

I like to consider myself fairly computer literate but I am having lots of trouble playing this game without my computer BSOD. I recently recieved a birthday present of a Sapphire Vapor-X 4870 and also Windows 7 64-Bit and since then I have had no end of trouble playing DAO. I have uploaded 2 crash dumps with this post in the hope that someone who knows more about this sort of thing would be able to help me as I have come up with nothing so far.

Ran memtest for 6+ hours with no errors.
Used various different catalyst versions to no avail.
Updated onboard sound drivers for my motherboard (Realtek HD Audio).

As far as reproducability goes, if i play DAO it will always BSOD eventually, sometimes it takes 30mins sometimes up to a 2-3 hours but its fairly consistent. The error code was always 0x0000003b until i worked out how to use windbg and found msnmsgr.exe (Windows Live Messenger) to be the 'likely problem driver'. I then played DAO without windows live messenger running in the background and recieved my first 0x0000001e error code.

Anyone got any ideas?

Just BSOD again after 1 hour of DAO, this time im back to 3b error code. Please help, having my computer restart 10 times a day is incredibly annoying.

There are not any driver downloads available for my motherboard for windows 7. I therefore downloaded the nforce 570 chipset drivers from NVIDIA DRIVERS 15.51 WHQL which i believe are the latest. I am currently using Catalyst 9.11 as my display driver which is the latest.

ok i am downloading and installing them as we speak, but do you really think i should be experiencing this much trouble due to not having drivers that came out today?

Have updated my graphics driver to no avail, crashed whilst i was ALT+Tab'd this time, reading this thread. Have uploaded the crash dump.

bump, no1?