CentraSite INTERNAL Domain users

How does one create additional INTERNAL users?

In CentraSite, the Administrator user has an ID of INTERNAL/Administrator. How can additional users be added to this INTERNAL domain?

Thanks!

Found the documentation hereā€¦ http://techcommunity.softwareag.com/ecosystem/documentation/webmethods/wmsuites/wmsuite9-5_sp1/CentraSite/9-5-SP1_CentraSite/ag-authent/intconf.htm#intconf