I understand I need to change the content of the site_html.pl file in order to customize my pages - yet I don't know how or where to enter the information. I have a definite page design I'd like to keep (with tables, etc.) - please, in laymen terms, explain how and where to add formatting html in order to customize the look of the Links 2.0 output. Many Thanks...

The easiest thing to do is to use templates instead of site_html.pl. Reply if you don't know how to use them.