ASUS N6600 does not work with one wide monitor and the oth..

Help me out guys,

Ive got an onboard video card, Intel 82945G Express Chipset Family,
and added another video card, The ASUS Extreme N6600.

I have Two monitors, One Acer AL1916W (widescreen, 1440x900) and the
other, an Acer AL1917 (1280x1024).

I want normal resolution so span both of these monitors.

1. When i install the Asus video card, the onboard video card does not
work. Is this normal?
2. I plugged both monitors, DVI for the widescreem and VGA for the
other, to the ASUS and the screen show up on both for a horizontal
span but the resolution is jacked up on the non-wide screen, can I
make these two work some how? I tried changing the resolution using
the NVidia software but to no success.

if someone could point me in the right direction, it'll be much
appreciated.

Thanks.