Change - to underscore in html file name
 

I bet this is a really easy mod to do if you know where your looking, but I am looking to make changes to my html catalog so that the file name has an underscore _ instead of a minus sign - inbetween words.
for example it is currently displayed as product-name.html
I want it to display product_name.html

Anyone know where I can change that??

A - is seen by search engines as a space, so dashes are recommended. You can choose a format when generating the catalog, or you can edit your admin/html_catalog.php file directly if you are familiar enough with PHP.