Favorite PowerPoint Features?

I actually discovered the slide master limitation by accident and it's now forcing me to go back and revamp my project. I just chalked this one up as a learning experience. Eventually when I get the training re-written I am going to build some scenario based learning tutorials in Articulate but for now I need to first get me training outlines revamped before I can do anything else.

Just so you know, I'm basically building a software tutorial and the product contains a approx 50+ windows that I need to incorporate into my training. The idea was to use master slides to hold my original images so that as the software changes, I only have to update the images on the slide masters. In flash this would be a really easy task. I would simply create symbols and if a window changes I simply update the symbol and the entire update trickles down through my entire project. I guess I'm so spoiled using flash, it's kind of difficult for me to digress back to Power Point. Granted Power Point has got some cool things but much of these effects were based on flash animation tweens and I honestly have created identical effects in flash in a lot less time with some pretty cool animations as opposed to Power Point but since others may have to update the project down the road I am forced to use Power Point. Plus I haven't sold my boss on Articulate just yet but once I am able to properly demo the product and show him the potential, I'm sure that attitude will change. At least I hope it does.