unzip all then content of percufola.zip in a repertory.
double click on percufola.jar
You need Java 1.5 to use this program. Thus if the jar doesn't work, you have to install Java. Its installation is really easy, go on http://www.java.com/ .
When Java is installed on your computer, you can launch percufola.jar .
Feel free to let comments here if you do not success to install Percufola.