Common to all J2ME programs you will need to download a Java Application Descriptor (jad) file and a jar file. Once downloaded you will need to use the software that came with your device to install it.
Please note that your Java system must support J2ME version 2 or above.
I have also created a PalmOS specific version available here. Please make sure that your device supports J2ME. For new devices Java is available from PalmOne.
You are welcome to have the source code to the Petri Net Browser. There is no licence or guarantee associated with this program. All I ask is if you develop further enhancements is that you consider giving me access to them so that I can add them into the next version. The sources are in Java JAR format and can be extracted by using the following command:
jar xvf PetriNet-Source.jar