This shows what's included in each package.
http://bend-tech.com/products.html
This is the rollcage templates
http://bend-tech.com/product_infos/bt_rct.html
They're just predesigned, verified templates you can modify.
Nice when you don't have the rigs in front of you or you're just wanting to visualize with correct dimensions.
What are modules?
Bend-Tech Modules are add-on applications that will enable unique features and functions within your Bend-Tech PRO, SE, or INDUSTRIAL. These optional features include sheet metal, roll cage templates, headers, handrails, and more.