You can do catwhiskers yourself, without a bow press. And they will last as long as your string does if you do 'em like I tell you.

Take a strip out of the package. Cut it crosswise into two equal halves with a pair of scissors. Place one half on each side of the string and clamp 'em in place with a pair of hemostats. Then take serving thread and tightly tie them into place, with the thread about centered in the rubber. Make an overhand knot on top, then one underneath, then back on top... about 3-4 knots per side. Then finish off with a square knot and melt the tag ends of the serving thread with a match so it won't come undone.

Then repeat on the other end of the string. Then seperate the legs.

If you need more silencing than one strip on each end, you can cut two strips for each end and tie on 4 sections at a time. When you seperate the legs, there will be so many legs that they'll puff out into perfect little balls. Kinda neat looking, but that makes 'em a little heavier and takes a couple of fps off your arrow speed.