CMS modifications (System: Openengine 1.9.1)

An already running CMS (Openengine) has to be little bit modified. - gallery implementation: for different topics or subpages different galleries are needed. (Topic A, gallery A). All in all there should be an unlimited number of galleries. They should be easy to fill with pictures and easily to administrate. Great would be a rotating gallery. - the header-image should change according to the subpages. Subpage A - headerimage A, Subpage B - headerimage B and so on. - there are already different contact-forms. There should be more formfields in the contact-forms (address fields an so on). When the contact-email is sent, there must be a line, where the email was sent from. (Sent by contact-form A, Sent by contact-form B...) In a specific contact-form must be a link where a user can attach a picture