just one precision ...
when you says :
If you have Geforce 4 Ti video card type in console
__GL_FSAA_MODE 1 to enable 2x Bilinear Multisampling
or add these lines as a option in XF86Config
what's section ? Section "Device" ? (i suppose...)...
and 2de question :
if you have 2 display with 2 video cards GeForce 4 (one for one, but not same chipset video, aka 1 GF4 MX and 1 GF4 TI)... that's possible to configure this variables ?