Changing the password for the default User

How do i change the password for the default user in centrasite i.e. ‘Administrator’ ? Also , i believe this user is not related/synced with the ‘Administrator’ defined on the mediator IS, is this correct ?

Thanks,
Janardan.

Please check here:
http://techcommunity.softwareag.com/ecosystem/documentation/webmethods/wmsuites/wmsuite9-0_sp1/CentraSite/9-0-SP1_CentraSite/ag-authent/intconf.htm#intconf

Thanks
Daniel