[Newbie]X server problems

[pemo]

I have a laptop Toshiba Satellite 5105-S607 equiped with NVIDIA GeForce4 440 Go card and a Toshiba's 15" UXGA TFT (1600x1200) display.
I'm trying to make RedHat 7.2 working on that system, but I have problems with making X server to work. My current version of X is 4.1.0.
I wonder if anyone knows what should be done and if the current version of XFree86 can handle this graphics card and display.
Any advice is appreciated.
Thanks.
Paul