Webzash on CakePHP Plugin

I have a working CakePHP (2.5.6) project having Webzash (accounting software) installed and running as a plugin.

Now I want to add a new type of report in that Webzash but I am just unable to even edit the existing reports in the Webzash.

Does anyone know how to add/edit a plugin running on CakePHP ? Or is Webzash even editable ?!

I have been reading the Cookbook (2.x) and looking for solutions online but to no avail so here I am with my first ever question.

Posted yesterday but not in the ‘Need Help’ section so didn’t get any reply hence posting it here in this section now. Any help would be highly appreciated !