The following screenshots should give you an idea of how the program looks. And hopefully a bit of an idea of how it works, though you'll need to actually use it to get a feel for how the hotkeys work.
The Wizard
The wizard helps get the needed information organized.
The Script Loader
Begin by loading a script.
A Loaded Script
After you've entered your script, there are some options to tidy it up a bit.
The Linker
And here's where the pages in the script get matched with the PSDs
The Overlay
Most of the work is done through the overlay.
Text
This tab lets you know where in the script you're at.
Styles
This tab gives a summary of added text styles.
Splitting it Up
It's possible to separate the tabs.