I am able to do it using an NVS 420 card, which is a lower version of that series. You have to turn all 4 monitors into 1 giant one using the Mosiac function in the Nvidia control panel.
Thanks for your response, the four screens are already into big screen and works well with other apps, i tested video with VLC and XP Pro SP3 but the quality is poor, is there any particular setting ?
thanks