using xpl with orbeon form builder

hi,

i am currently having problem with using the orbeon form builder. i need to save into an oracle database called DPS. i am planning to use a xpl file to save the form but i am having trouble trying to call the xpl. can any1 give me instruction on how to set the form to call the xpl, for example where should i place the xpl in the folder and how to set the page-flow to get the xpl.

Thanks