Hi Garrett,
Question One : How about
DVD Shrink this will shrink large DVD's to fit.
Question Two : There are lots of DVD authoring tools out there, i guess it is just a case of trying them out, lots of them enable you to make fancy menus and stuff. Have a look
here
Question Three : Have a look at Boilsoft's
joiner/merger
I am just learning all this sort of stuff, I'm mainly interested in making fancy slideshows with music and transitions etc and I find this site very useful indeed. The forums and the guides are all very good.
VideoHelp
HTH
Nicola