X3Photo Gallery Forums

For such purpose i would put something "before" user enters into the gallery.....some re-direction that triggers the link to the gallery.

Or just protect the folders with +18 photographs with a password and let the users require password by using the contact-form.

You would need to create a start page from html, or just open some custom html in a lightbox ... its nothing that comes pre-packed with Imagevue unfortunately.