You know what, I blew it.
I was actually thinking "gPhoto fader", by Grant Skinner. I've used Simpleview before, and so I mixed the two up.
My bad. I said the wrong thing.
gPhoto fader is kinda similar to Simpleviewer, but way less powerful.
Basically, it is just a swf file, that loads jpgs/swfs, via the directions in an xml file. You can control the duration and fade "smoothness" in the xml file.
I've used it tons before, but I can't seem to make it work here.
Sorry for my sleepy confusion.