installing drivers on freebsd 6.2

[linux at x.deedni.com]

help!  i'm just about ready to give up on freebsd, because i can't
figure out how to get these drivers installed and i'm getting extremely
frustrated.

i have an intel 965 chipset, and have downloaded and extracted the
following file:
http://xorg.freedesktop.org/releases/individual/driver/xf86-video-i810-1.7.4.tar.gz

can someone please give me step by step instructions on how to get these
drivers installed?  i am stuck at 640x480 resolution, which is way too
low for me to do anything productive...