Please direct your users to webhelp.episerver.com, there they will find the user's manual for EPiServer CMS 6 R2 and in that there is instructions on how to create forms.
However, creating forms only works on page types that has a xform property, just so you know.
This article should be good starting point for developing with XForms.
I would also take a look at the AlloyTech sample site to see how XForms is used (make sure to take a look at both XForms.ascx and Global.asax.cs).
Would appreciate if someone could share links to form creation using EPiServer.
I would like to enable my Content editors to create their own forms.
Thanks in advance.