This is taken from the post "openbsd user can't connect to adsl" .
I want to make it simple and working HOWTO .
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http://www.openbsd.org/faq/faq15.html
export PKG_PATH=ftp://openbsd.mirrorcatalogs.com/pub/OpenBSD/5.1/packages/i386/
Or other ftp site.
pkg_add -v gnome
pkg_add -v gnome-extras
In /etc/rc.conf make sure You have this:
pkg_scripts=dbus_daemon
Edit /root/.xinitrc
And add the line:
exec gnome-session
reboot
startx