No need to uninstall the older version, just install the new one via ports. At the end, it will spit out a message to add 'exec /usr/local/bin/fvwm2' to your .xinitrc or .xsession file. That will Do The Right Thing.
On 2007 Mar 02 (Fri) at 19:24:58 +0800 (+0800), ronald jiang wrote: :I want to install a newer one. : -- Uncle Ed's Rule of Thumb: Never use your thumb for a rule. You'll either hit it with a hammer or get a splinter in it.