craftgrrl | collage... a window shade?

i've got a box of magazine cut-outs and a very boring white window shade in my bedroom.... i think they've been flirting with each other for a while and it's about time they were fused into a big beautiful collage.

i'm wondering what kind of adhesive/glue i could use that would keep the pictures sticking to the shade, but still allow me to roll the shade up on sunny days. any ideas?

i'm considering just decoupaging it and leaving it permanently down, but i want to see if there's some miracle glue i just dont know about first.

thanks everybody!