How do you install a distribution file (not a port name)?

[James Moore]

How do you use the port command to install a distribution file?  I've
got a bunch of things downloaded and I'd like to just copy the files
over to another machine and do something like:

sudo port install /opt/local/var/macports/distfiles/git-core/git-1.5.6.3.tar.bz2

But that looks like it's taking the entire string as the name of a
port.  I haven't seen anything on the man page or the mailing list
archives that's helping figure this out.

I'm running 1.6000.

-- 
James Moore
james at restphone.com
blog.restphone.com