如何同时在jenkins上运行Selenium测试套件

Right now I made 5 test suites on selenium IDE. So, for each one I make a new Jenkins Job. Each one of these suites last about 30 minutes, but I need to run the 5 test suites at time to save time. I read about Selenium Grid plugin but it isn't working for me because it starts a selenium-server.jar automatically and the build cannot run for it, because it cannot start another selenium-server.jar...So I want to know if there is another option or if I have to wait for each suite to finish to run the another one.Right now I made 5 test suites on selenium IDE.