Can intel 945GM chipset in T60 support discrete graphic card

[bibo]

Can intel 945GM chipset in T60 support discrete graphic card? I saw the sony SZ notebook had both Nvidia and GMA950 graphic cards. If it can, is it possible to buy a ati video card and put it in the T60 that has a integrated video card by ourselves?

here is sony sz160

Specifications • Model
VGN-SZ160P/C



• HARDWARE


• Processor Name
Intel® Core™ Duo Processor T2400 (1.83GHz, 2MB L2 cache)1



• Operating System
Microsoft® Windows® XP Professional with Service Pack 2



• Front Side Bus Speed
667MHz



• Chipset
Intel® 945GM



• Hard Drive
100GB2 5400rpm Serial ATA with G-Sensor™ Shock Protection - Hard Disk Drive Protection



• Integrated Wireless LAN
Intel® PRO/Wireless 3945ABG Network Connection (802.11a/b/g3



• LCD
13.3" WXGA with XBRITE™ Technology (1280x800)4



• Graphics
NVIDIA® GeForce™ Go 7400 and Intel® Graphics Media Accelerator 950



• Graphics Interface
VGA out w/Smart Display Sensor