Hiding a master page based on condition

Hi All,

I have created a form which has data on odd pages and some terms and condition on the back pages(even) pages. I am using Adobe Livecycle Designer ES version 8.1.2

For this I created 4 Master pages.

FirstPage - Pagination -> Odd/Even - > Odd (front) pages

                                   Placement -> First Page (in Page set)

Front Page - Pagination -> Odd/Even - > Odd (front) pages

                                   Placement -> Rest of pages

BackPage - Pagination -> Odd/Even - > Even (Back) pages

                                   Placement -> Rest of pages

Dummy - Pagination -> Odd/Even - > Blank page

I dragged the content area of back page on the dummy page.

This set up works fine for printing.

I have additional requirement of archiving, emailing and faxing. While sending a email or fax or archiving, the data should be continuous, the 'BackPage' master page should be removed otherwise they show in alternate pages as blank pages even if i set the presence property to 'visible(print only)' .

Are there any settings which can be done to remove the master pages that are not needed based on a codition. Or can we achieve it through scripting.

Regards

Neha