Joe - From my frequent use of both products, I have been able to summarise them as follows:
- PD is an excellent video editing package which can create basic menus (authoring)
- PP is a decent authoring program with very limited editing capability.
Obviously Cyberlink have tried to deliver two products which are different but have an element of overarching commonality i.e. you can capture video and via a simple workflow, produce a DVD. However, PD and PP are not expensive and one needs to bear in mind they have their limitations.
Robert (WA) - From what I understand of your requirements - i.e. to allow either a main menu which can play the whole movie or go to a scene selection menu etc. - I think you need the ability to create a playlist.
Whilst PP5 does not do this yet, I have found a wonderful bit of software which does this brilliantly - DVDit Pro 6 from Roxio. It costs a lot more than PP5, but at least offers this and other higher level functions for those prepared to pay for them.
Windows 7 - i7 860, 8Gb RAM, 2 x 1 TB HDD, GTS 250 1Gb Video