I use super glue with the spray super glue accelerator, available at hobby shops. But first you must test fit the boot, mainly the clamps, because for some reason one of them is sometimes to long. You may need to carefully shorten the clamp by re-bending the end.
I apply the super glue along the seam, hold it together and spray on the accelerator. The accelerator is not necessary but does speed up the drying so you don't have to hold it together to long and risk moving it while it dries. This is just to hold it in place together. It is easier with two people, one holding and one spraying the accelerator. While gluing the seam the boot must not be over the axle tubes so the seam is held together as tight as possible. After super gluing you then carefully put on the staples using needle nose pliers to form them in place. I then put a layer of Seal All Glue
http://www.biosafe-inc.com/sealall.htm on the seam and work it under the staples. I let that dry overnight. Then you apply a bead of Seal All around each axle tube where the boot goes on. This makes it easy to pull it over the tubes and seals it up completely. Be ready with your clamps, put the bigger side on first, applying the glue only on that tube. After you have clamped the bigger side then glue the smaller tube and pull the boot over it and clamp it on. I then apply another coat of seal all glue over the seam.
The position of the axle tubes is also important as they must be as level as possible to let the boot fit on without stretching it out by having your axle tubes hanging. To do this jack up your car by the frame and then jack up your axle tubes and put jack stands under those to hold them level. And remember to test fit everything before gluing, especially the clamps, you may also decide to adjust the axle tube position by raising or lowering the tubes.
Of course this is just one method and others may have a better way or a different glue they prefer, but this has worked for me.
