Adding selection list of categories to a web form - 2.2 beta

[jbilderback]

I'm using WCM 2.2 beta.
I want to add a selection list to my web form for Language and I want the selection options to be the sub categories under the Language category in the Alfresco admin tool.
Does anyone have an example of generating a list of categories from a jsp include in an xsd for creating a web form?
I've seen the example jsp for including company footer choices from the WCM tutorial.  I am hoping there is an easier way to pull in a list of categories.

[alf_beg]

I have the same request. Is there a simpler example to understand how to create the jsp file that is included in the XSD file ?