Self-portrait proposal

I think what I want to do will be a bit challenging. I love the idea of overlapping negatives, but I kind of felt deterred when I saw what a difficult time my classmates were having with their photographer project. I was wondering instead of negatives, could I somehow utilize photogram techniques in this? I want to go in to the more graphic direction again... If my images had to have a theme (do they have to have a theme? I wasn't sure about that), I am thinking of making them about body image & appearances. I'm also interested in fashion photography poses and incorporating those into my images. (I'm a huge fashion fanatic and fashion photography is my favorite kind) Oh! And also lots of props and crazy compositions. One particular image I want to do is me standing with my ribs sticking out in all their glory, hands on hips, with an overlay of graphic skeletal ribs. Is it possible to print the ribs on transparencies and overlay them onto my image in the printing process? Like say, my image takes 18 secs, so at 12-15 secs I put the rib transparency on top of the image and for the rest of the time flash the light.