Thanks. I actually wanted their expansion to be normal (i.e. Romans conquering the world). Adds so much more challenge. Just looked through Total War Centre, and using the search option, I have found a topic that says it does seem to help turning prefers_naval_invasions to yes. Not a big topic, however here's the link:

http://www.twcenter.net/forums/showt...cr_sm_factions

Perhaps this naval invasion option is a simpler way of partially fixing the expansion bug. With my modified units mod I used before that cut costs and upkeep and upgrades of units, the Scipii were doing well expanding, as were the Julii. The Brutii...they got p'wned by rebels, since as the rebels could build very large garrisons...lol. However, I've started a different campaign with no cut costs whatsoever, so the expansion of the Romans might be hindered by the fact they can't build hundreds of cheap Hastati and Princepes, etc.