Optimize Press 2 - Background Image

Hi, I am "trying" to create a custom landing page "series" with a full background image... in OptimizePress 2.0 (as stand alone pages) as a 3-4 page sales funnel with a "background image" on specific pages.

What I am trying to figure out;

Is there an easy way to add a large "fixed" background image (975px width x 1500px in height) whereas I can add content over that background image, like other images, such as, text, my video (VSL), and an optin button?

I had planned to use an overlay "pop up" optin then redirect to a "Thank-You" special offer page before giving them their free download access. (*So at best, I need to create 4 pages congruent with the background, each page having different content. But, I am clueless as to how to make the image the background?

I designed the entire landing page in Photoshop, and have the "elements" in sections (i.e. header, background image, footer, a custom banner/divider with custom text, etc...) What I'd like to be able to do is change the white space on the page post section, and write on or overlay other images a top of a background image...

Is there an easy way to add the background image on "specific pages" only?

If so, would this require editing the main site css files? or can it be done from a new page creation?

I understand the "page builder" option allows for pre-templated opt-in pages, whereas, I can change the full screen background image w/ a predetermined "optin box" feature, but I cannot determine: if there's a way to create a complete custom landing page with header, full background image, and adding elements such as a video intro, with a "Get Access Button" that opens an optin form..."without" altering my overall settings for my blog, other pages, etc...

I'll add an image here in a minute to better detail "What I am trying to do" - Thanks...



*Ultimately, I wanted the entire background image to be a full screen/width, and have 3 elements (video player, button, and privacy & legal disclaimer links being responsive... or clickable. Can this be done with OptimizePress 2.0?

Art