1.) So basically, it is just two ready-made present bows stuck together. If the tape that comes with is already sticky enough, you can just peel off the stickers and stick them together with the ribbon in between.
If you need extra reinforcements, use double-stick tape or a stapler.
2.) I like to cut the ribbon after I finish putting all the bows together and I have it extra long at the ends to be able to tie it to places.
3.) Ta-Da! Pretty Garland made in like 10 minutes!
You can do this with any kind/color of present bow, but I found mine at Border's Book Stores. They were actually on clearance at one of the closing locations.