Any tips for installing a cover, without a roof ladder?

Dont make my mistake. I used a rope tossed over from one side to the other then tied an end to the cover and pulled it up, over and then down the other side. Problem was where the rope came over the top and down the side it was rubbing on the edge of the roof. The rubbing/abrasion of the rope wore a hole in the membrane and caused a leak that I ended up patching with a strip of eternabond. Now I carry the cover up a ladder and roll it out on the roof and then let it drape down the sides.