Change in Organization assignment date of employee with new designation

Hi Guys,

In our organisation sap is started from 1st Jan,2004 & Payroll in Sap also started in 1st Jan ,2004.

at the time of implementation all the employee has been given the joining date 2004 or after 2004.

But now the authority want the employee whose designation is something before 2004 should also come in SAP generated report without any affect in payroll?

My first question is i it possible?

Secondly is it possible by organization reassignment action make the changes of employee designation or add employee designation before its organization assignment date

thanks

Surajit