ATI Radeon 7500

1 -
modprobe agpgart (2.4 kernel series with nforce2 agp support 2.4.21 and above)
2 -
emerge xfree-drm
3 -
modprobe radeon
4 -
look at the following xf86config_asus_radeon.txt for more information.
if you want nforce2 agp support on kernel < 2.4.21, download this patch and patch your kernel.