527796 Modify Perl Script for HTML parsing

I have an already made Perl script that parses a specifically formatted HTML document. It works exactly how I need it to. However, I now have a different HTML document that I will need to parse. There is only one difference in the fields that is pulls. It should only take a programmer about 5 minutes, but I cannot figure it out. I will send the files upon request. This should only be a 5 -10 minutes project. I am just not skilled with perl.