It seems that it's not possible to chage ports for the pre-defined applications under Operate->Applications and Services.
We have a business application that we would like to define but that applications ports (tcp 3128 and 5001) collides with already prededfined applications like:
Application Details: httpProtocol(s)/Port(s) tcp/80, tcp/8000, sctp/80, tcp/3128
Application Details: yahoo-messengerProtocol(s)/Port(s) tcp/5000-5001, tcp/5050, udp/5000-5001, tcp/5100
By showing the wrong application name for our own applications makes the Assurance part pretty useless for us and our help desk.