There is no tool to create the encrypted password needed for the virgofactor.conf file used in standalone virgo instances.   To create a virgofactor.conf file with password, execute once a manual Virgo installation and use/store the created encrypted password for future usage or take the password from central serve’s Virgo's safr-factory.conf file and place it into remote Virgo to enable.  You can find the safr-factor.conf file in the /etc directory as described here.