Changing location of ports tree

[ross]

My /usr partition is to small for some of the larger programs  
(openoffice.org, jdk, etc) and I want to move my ports tree to a harddrive  
with more space. can I just change the line in
/usr/local/etc/pkgtools.conf that says "ENV['PORTSDIR'] ||= '/usr/ports'"  
to "ENV['PORTSDIR'] ||= '/mybigfatharddrive/ports'"?

Will all the pkg tools such as portsnap, portupgrade, and portversion  
continue to function properly? will I have to edit any other config files  
before this will work seemlessly?
-- 
What time is it?

Dodgeball Time!