How do I use the Print Module with a Custom Form Module? I have searched and searched but have not found a definitive answer or direction. I've installed the Print module (Printer, email and PDF) and have it successfully working when associated with content types.

My problem however, is making it work with custom forms. I have tried placing print_insert_link() in the form and it doesn't show up. I think all I'm missing is an example of print_insert_link() pointing to a custom form module. The path for the custom module I'm working with now is glatfelter_forms/form_scorecard.  How do I properly use print_insert_link()?  I'm using Drupal 7.23. This is my first post so please let me know if I can provide any additional detail. Thanks!
In the configuration page of the Print module at admin/config/user-interface/print, there is a section 'Show link in system (non-content) pages'.

If you select Show on only the listed pages. and enter the path of your form (glatfelter_forms/form_scorecard) in the textarea below, there will be a print link on that page.