problems configuring X...HELP!!

[H. Valdes]

I've just installed Red Hat Linux 6.0 on our brand new gateway (dual
boot)....Everything went fine up until trying to configure the video
card...I have an ATI Rage 128 GL AGP 16 MB card and a VX900 Monitor....I
can't find my card, nor  the monitor among the ones listed ...Does anyone
know how to configure this card/monitor....HELP PLEASE!!!