right !!!
take your primary, win 2000 prof HD out, diconnect, take the HD OUT of the removable and connect that in it's place of the win 2000 prof. ..with no other HDs , maybe nothing but a cdrom diive and the HD from the caddy / removable ( the hd is out of the removable unit and, by itself is attached to the ide cable and is primary drive) then try and install win 2000 adv server.