New comp, crazy texture problem

Right now, am just trying to get FS2004 working properly on my new comp. (FSX will follow once FS9 is successfully working). I've deleted everything including saved files, and done a fresh install several times. Still, whenever FS is run, the system often crashes with a brief blue screen displaying - in fact, so brief that I cannot read it; and worse, the textures have started to go crazy...(apologies for bad quality, pics taken with a camera as screenshots not possible when crashing). This manifests anywhere from about 10 seconds to 10 minutes of flight time. Am running both WinXP & WinVista, and the pics here represent what happens in XP. With Vista, the system just crashes completely.
http://i221.photobucket.com/albums/dd2/ ... prob_A.jpg
http://i221.photobucket.com/albums/dd2/ ... prob_B.jpg
http://i221.photobucket.com/albums/dd2/ ... prob_C.jpg
Computer hardware: GEForce 8800 GTS 640MB PCI-E videocard (factory superclocked), ASUS Striker Extreme motherboard, 4 X 1GB Ballistix RAM, 4 X 250 GB Seagate SATA harddrives in RAID array (with WinXP & WinVista installed on separate drives), 1KW Antec power supply, Intel E6420 Core Duo processor, 1 X Zalman CNPS9700 NT CPU fan. Temps running maximum of 35 Celsius, motherboard at 34 Celsius (with FS running). Any suggestions appreciated.
http://i221.photobucket.com/albums/dd2/ ... prob_A.jpg
http://i221.photobucket.com/albums/dd2/ ... prob_B.jpg
http://i221.photobucket.com/albums/dd2/ ... prob_C.jpg
Computer hardware: GEForce 8800 GTS 640MB PCI-E videocard (factory superclocked), ASUS Striker Extreme motherboard, 4 X 1GB Ballistix RAM, 4 X 250 GB Seagate SATA harddrives in RAID array (with WinXP & WinVista installed on separate drives), 1KW Antec power supply, Intel E6420 Core Duo processor, 1 X Zalman CNPS9700 NT CPU fan. Temps running maximum of 35 Celsius, motherboard at 34 Celsius (with FS running). Any suggestions appreciated.