[reverend]

Textonly mode is really simple:

Basically:
dom2 --tcpserver --textonly --nosound --nomusic

For a LAN game you'll want to host turns as soon as they're in:
--quickhost

The only thing missing is the port and the map:
--port #portnumber# --mapfile #mapfile#

Last parameter ist the name of the game.
#game#

Other switches you might want to use:
--hofsize
--indepstr
--research
--magicsites