1 - You already extracted all the files from EQUIP_date.zip
2 - Use this folder or move somewhere else in your computer. You need to check that all these files have been extracted:
EQUIP_date.jar
freehep-jminuit-1.0.jar
jcommon-1.0.17.jar
jfreechart-1.0.14.jar
junit.jar
librxtxSerial.jnilib (only needed for Windows)
RXTXcomm.jar
README
rxtxSerial.dll (only needed for Windows)
-classpath
or -cp
overrides any setting of the CLASSPATH environment variable. From: http://docs.oracle.com/javase/7/docs/technotes/tools/windows/java.html