Configuring mod-Perl to handle only some file types

Hello,

I have a mod_perl program that is written to handle URL's that
name either a directory or *.html type files. All other types
I want Apache to just do its regular thing (e.g., serve image
type files, or .doc, .pdf, .js, .css, etc.) 

What's a good way to configure that? So for an entire website 
directory, and all its substructure, my perl handler gets only directories
or  *.html files, and apache handles everything else without
involing my perl handler.

Thanks for any help or ideas.

Joe N