Hi Randall,
That is not an easy one. Acrobat forms and LiveCycle PDF forms have different underlying structures so are not directly convertible.
If you have a static form (do not use any dynamic features) you can open it in Acrobat then Print to PDF. This is called re-frying the PDF. When you do this you will lose all the active fields and scripts and need to recreate them.
If it is a static PDF, then a tricky way to do this is to delete the XFA Dictionary out of the Acroform Dictionary. That requires understanding the internal structure of a PDF file and having the appropriate tools to analyze and locate the Dictionary objects.
Hope this helps,
Dimitri
WindJack Solutions
www.pdfscripting.com
www.windjack.com