The arguments to be passed in are: 

-Detools_perf_ctrl="log=d:/perflogs/v6001;testd=51" -Dtomcat.server.v50=E:\\Tomcat\\Tomcat5.0

, where etools_perf_crtl is the log output directory and test id, and tomcat.server.v50 is the install directory of your Tomcat v5.0 server.