You're correct, I was wrong, Livetype did in fact disappear after FCS 2, and thus FCP 6. However, many users copied it from their FCS 2 discs to their boot drive running RCS 3, and it did work, at least it did with older versions of OSX.
David Roth Weiss
Director/Editor/Colorist & Workflow Consultant
David Weiss Productions
David is a Creative COW contributing editor and a forum host of the Apple Final Cut Pro forum.
Much of Livetype and Livefonts was ported into Apple Motion 4 and 5, so, if you've got the OS version to support it, there's an inexpensive alternative as well. Though it's kind of overkill to only use something as capable as Motion as only a Character generator... still, it will do your CG's and so, so much more, really worth having.