Help!!How to uninstall build system toolkit v6.0.4 from IBM i

       In my scenario ,i have installed build system tookit v6.0.4 in IBM i and corresponding java support starts at jdk1.7 but unfortunately we don't have jdk1.7 in our IBM i.We are getting error with this java package ,so we planned to install the build system toolkit v6.0.1 as it support our jdk version 1.6.Before installing the new version we need to uninstall the existing version as it create some problem in future.Help me to resolve this as soon as possible.