How are the following programs for DVD editing?

[phenryiv1]

I am interested in particular in the ability of each of these programs to combine compilations that have more than one source title into a single output title. Sorry, I am not good at analysing the specs and features.

Programs:

windvd creator 2 http://www.trygames.com/game/aff=t_0...821bad547197c1

Adobe Encore DVD http://www.adobe.com/products/encore/main.html

Adobe Premiere Pro 1.5 http://www.adobe.com/products/premiere/

Thanks in advance!