There are just a couple of things about your tag that you need to know.
First the tag must be saved as a .pspimage. I always have a white background but I turn it off when saving the .pspimage.
When you save your .pspimage, I always save as the name of tag I am doing..i.e. butterfly, fairy, etc. But that is up to you and what is easiest for you..As you use this script more and more, you will have your own shortcuts!
*****TIP****
This is a great tip..when you save your .pspimage for your tag always put _ (underscore) before the name. This is very helpful to you when finding your script as it will always be listed first..You will see as you do more and more tags!