I would roll it up on the roller and then un roll it just like any large piece of fondant.Or you can use your arms. Thats what I end up doing because the fondant sometimes sticks when rolled up. Good luck with it and show us a picture.  I'd love to do that myself some day.  :)

That is how I do it pick it up with arms but its so large it begins to tear.  I guess I will just have to move faster.  Also, two of us picked it up.

AMake it on a piece of cardboard, then, when its time to put on e cake, just slide it off!