Hi,
When you create a form in LC Designer, it the XFA form so that Acrobat/Reader can open and interact with the form. However this XFA form is completely different from a form developed in Acrobat (AcroForm) or any other standard/flat PDF.
When you open an XFA form in Acrobat you cannot do some of the standard Acrobat functions. This isn't a hidden restriction that you can turn off - it is juat the way it is.
So in Acrobat you cannot insert pages into the XFA form, using the Document / Insert pages menu. However you can develop a button on your form in LC designer, to insert a page at runtime.
In relation to exporting a page from your XFA form, you can use the File / Export menu to export to an image file (eg JPEG). In addition you can print the form to PDF using Acrobat.
In summary:
Extract - either export to JPEG and deal with the image files OR print form to PDF.
Good luck,
Niall