I work in one area that doesn't have DHCP set up for wireless, so I've
set all the configuration information for it under "alternate
in the TCP/IP properties.

This works fine, but
the problem is that that I move in and out of this area fairly often,
and it takes a long time before it decides DHCP is not working
and fails over to the static setup.

Is there a way to shorten the timeout for DHCP? The default seems
much longer than any realistic situation.