Which iOS presentation/slideshow app can be controlled by a Trust Wireless bluetooth remote
As of March 2012 there doesn't seem to be a real presenter app for the iPhone, which supports the Trust Wireless Remote Control (or generic bluetooth remotes, that do work with music apps) and offers VGA-out. 

I really hoped I didn't search thoroughly enough but it seems such an app has yet to be made - and I bet it would sell well.

So, if anyone happens to find such an app for the iPhone or something that supports QuickTime movies with manual advance: please post it here and I'm gonna reward a bounty of ≥150 points.

The best way to go till then: Use a collection of pictures in slideshow mode of the "Photos" app (supports both VGA-out and bluetooth remotes)