PE04 : Create New Operation

Hi Guys,

I want to get some idea about creating New Operation using transaction PE04 to be used in Payroll Rule PCR .

Does anybody has any kind of documentation for the basic steps for creating Operations ???

What I know is after the Create Option for Operation is selected on PE04 transaction , the Country Assigment and the Strucure Model has to be selected , the parameter o/p Variable has to be created , then clicking on the source text , the coding of program has to be written in an Include program of Payroll Driver RPCALC** ??? Is that it or what steps i am missing??

Please advise.

Jay Gandhi