I never had any interest in this one, but it's a Europa-R setup like Sega Rally 3 and Grid Arcade, isn't it? Probably more like SR3. That means setting network enabled and network position in shelldata.ini - at least for Grid that's where the setting is. I seem to remember setting IP's somewhere as well, though when i set up Grid last week i cant remember doing that. I must have, though. I'll check when i get home tonight.
What does the TP compatibility github say in terms of instructions, subnets, etc?