Sounds like a question directed strait at somebody and not the forum.
However seeing as you asked here you can use any tool that creates .avi files to make your cinematics. Whether it be film footage, rendered image sequences or hand drawn scans.
DBPro will play back the .avi on any machine that has the same 'codec' that you saved the file out with - if you have installed no new codecs then you are safe from incompatability - if you have done so and use a new codec for your .avi files then the end users will also need that codec.
As for making them... Well that's a lifetime of experience which just cannot be put into a forum post.
Pneumatic Dryll, Outrageous epic cleric of EQ/Xev
God made the world in 7 days, but we're still waiting for the patch.