JCPSP?

I/ve d./l the psp emu (jcpsp) and I'm trying to run it once I opened it. I see a MSDOS batch file and like a jar. exe file. What do I need to run these? Any help is much appreciated?HoustonTX224

I think you may need Java Runtime Environment, but you may not.Just try clicking on the JAR file. It opens for me that way.
If it doesn't, then get JRE.