I decided to do the photomovie before our trip, so while we were there I made sure I took lots of pics in each park, so I could make a chapter for each of the parks. It sort of forced me to take pics, when normally I'm too lazy to take a lot. And I made sure we stopped for the photopass pics so we'd have a selection of them to choose from - pics with the whole family, which we rarely get. It took a while to set it all up, but it was easy and fun too. I also tried to relate/time my pics with what was going on in the background - for instance, in EPCOT when they show Mickey scuba diving, I inserted a pic of my husband and kids looking into the stingray tank at the Living Seas. You can preview each chapter so you see where your pics are in relation to the background graphics. I tried to use as many pics of our family as I could, and as many chapters as I could - I figured this way I'd get the most for the $$ and even though the Disney photo gallery shots are nice, I wanted this to be about US at Disney, not just lots of Disney shots.
Hope this helps...
~Linda