Ahh not these threads again
Basically, if you want to do it in the most easy fashion, get a sleeve of pro v1s or the new callaway ix balls or whatever they are called, as long as they are good soft golf balls. Personally I like the pro v1.
If you wedge's grooves are worn, they will not produce spin. Also remember that if they are full of dirt and grime then the grooves will not be able to grip the ball and spin it back, so use a groove cleaner. You really need to hit down on it and pinch the ball so that the grooves give the ball more backspin. However, I find that if the ball takes one or two hops and then stops I am in a better position as I rarely hit it past the flag needing it to spin back. To be honest backspin is overrated. At first I was like "woah I just spun the ball 10 feet!" and I seemed to feel that the zipback was more important than being close to the hole, as it left me 20 feet from the flag and had it not spun, it would have rolled next to the pin. If you hop and stop it, you should be happy with the result.