PloneFormGen represents a form as a folder and fields as items within it, which lets it inherit a lot of its user interface "for free" from Plone. To start a new form, pull down the Add new menu anywhere in a Plone site, and choose Form Folder.
Easing the mental mapping for users
Though it simplifies the codebase, the way forms behave like folders is not always intuitive for less technical users; some will need a bit of training and acclimation. For larger organizations, it can help to have a Form Czar or two: community-minded power users with people skills who can render informal first-tier support and training.
After you ...