Don't use Movie Factory 3 myself, I have version 2.
But one of the problems with using only DVD Creation software is that the editing and composition tools are basic to say the least.
You would be much better off creating your movies in an editing package (lets say Ulead Video Studio) and then using Movie Factory to create your DVD. The good news is that Movie Factory will allow you to have multiple chapters (or titles as you call them). But it is better to create the individual movies first via an editing package.
Why don't you download the trial version of Video Studio from http://www.ulead.com/vs/runme.htm and click the FREE TRIAL button.
COMPAQ something or other with 500Gb Boot Disk, 1Tb external Firewire Disk, 4Gb Memory and a super duper sound card, 19" TFT Monitor etc etc etc
Sony TRV33e : Sony TRV310e : Canon XM2
Sony Vegas Studio editions to v11
Remember, there is always more to learn than there is to teach.