[wp-hackers] Theme Switcher hack help

[R.J. Kaplan]

I know this isn't strictly WP related, but I'm setting up a theme  
preview inviorment for a project I'm working on. I'm using the theme  
switcher plugin to preview the different themes. My problem is that  
they're some themes with the same name, and Theme Switcher uses the  
theme name to select a theme. I would like to set it up to use the  
theme's directory name instead. Anyone know where I should look /  
what i should do to get started?
~Joe