Adding Users remotely (or by script) with Mail Enabled?!?!?

Any one have any experience adding users from the terminal/shell script/remotely? I have had some success by writing scripts using the niutil command . . .but for some reason, I can't get the newly created users to have mail service enabled. Usually, in the Server admin, you can go to the last tab and enable it . . . .but how is it possible to do it from the terminal?? One of the keys in each NetInfo user is applemail - but copying that information doesn't enable mail service...... :? :x :cry: Please help!! --John David