Scrolling text - lower third -across

I need some suggestions on creating lower third text that scrolls across the screen.
I have FCX ( including Livetype ) and of course iMovie.
Everything there scrolls up and down. ( I think...lol...at least I can't find the answer )
I have searched for applications that would duplicate what I did on my title maker direct
to video and have been unable to find any answers.
Going back to square on and recording direct to film and then capturing and editing is of course possible but that would a long route for what seems to be doable on my computer.
Any suggestions??