Dual-head Gnome / GDM workin with NVidia on Mandrake 9 but (help...please)

the CRT device is the first screen while the LCD is the second one. May I
change it?
I sent my XF86Config file.

However, wheter i set TwinMode off, i can use the hot keys to switch between
my monitors but when I try to use LCD+CRT togheter (as TwinMode=on and
Orientation=Clone) the LCD resolution becomes 640x480. How do i fix it?
I expect to use 1600x1200 resolution at the 2 screens...

Thanks...