Well there are several ways but the one I used to do my last bow I learned this year at MOJAM from dvshunter.
Soak the skins in warm water until for about 20 minutes or so.
It is simple add glue to the back of the bow so it covers the whole thing.
Lay skin on bow and press it down with your fingers working from the middle out and from the one end to he handle. working out air and glue bubbles.
let it set for about and half hour to let the glue set of bit then work the skin again looking for any air or glue pockets.
let dry I prefer over night just to be sure the glue is good and dry.
Then use a file and file the edge of the bow and you will see the skin where it meets the corner to cut. you go down the whole length and it cleans up the edge and trims off all the excess.
check your edges reapply glue to any area not holding. It happens on the edges mostly. (if you find it in the middle use a razor cut a small hole and put some super glue in there. I have not had to do that yet).
Here is a close up of the last couple of my skinning jobs.
I have only done about 4 bows with skins. I tried the wrapping them and had more issues doing that. Skin slipping, more air pockets and such.
Also if you do more then one skin on the same bow, do them one at a time. You dont have to let the first one completely dry you can do them one after the other but get the first one on and where you want it then do the other.