You might want to check out Petruchio's Tk::Style. It uses XML::Parser to store Tk widget options... And does pretty much all the work of getting those options to the proper widgets for you. I'm sure you could figure out a way to also add in miscellaneous other options (ie, file paths) in the same file.

bbfu
Seasons don't fear The Reaper.
Nor do the wind, the sun, and the rain.
We can be like they are.