...
The machines are installed using the supplied machine_setup_machines script, which is either machine_setup_machines.bat on Windows or machine_setup_machines.bash on Mac OS X or Linux.
However, the installation takes place via an automated script so the user is required to accept the license prior to executing the script by editing the machine_setup_machines script.
On your host machine, in the REP_HOME/Rep Attack 11g XE directory, use a text editor to edit the VBoxMange import command for BOTH machines and accept the elua by removing the show and decline options.
...