[Shaun Roemich]

In DVD Studio Pro on the Mac, you could program end jumps at the end of markers to jump back to the marker, requiring a Next Chapter input to move forward. Then you would just need to build a chapter marker before the "spectacular" transition (let's call this Chapter marker 4) and one immediately after the content to be "looped" (call this Chapter marker 5), and then have the Chapter 5 marker End Jump to Track =>Chapter 5 which will cause chapter 5 to repeat until the Next Chapter button is pressed.

Not sure if Encore supports this so I can't help you there.

PS. From personal experience, you're going to have problems displaying PP on a tv or projector due to small font sizes and title safe area. The PP will only be "acceptable" to critical eyes if the fonts are large, bold fonts and all content well placed on the slide.