Re: startx Problem 2.6 kernel Gforce ti4600
Are you emerging the nvidia-glx and nvidia-kernel or installing using the downloaded NVIDIA-*** installer from nVidia?
I have bad luck with with the Gentoo nvidia-* stuff. If you have emerged the nvidia-* stuff, unmerge it, install from the downloaded NVIDIA-* installer and fix the links manually.
I have found that "no screens found" has to do with your monitor setup. They look like they are set too low, and since your first resolution is 1280x1024, it wan'ts to display that first.
Double check the specs of your monitor and ensure that Horizsync and VertRefresh are set properly.