for stopovers i think the best plan would be just to make two seperate flight plans..
or do u mean add a stopover to euroharmony plans, by the way what is the policy on stopovers on eh flights?
and for the stepped climb, its possible using somthing like fsnav, or by controlling the autopilot manually. However im not sure about 2004 but in 2002 you couldnt change your cruising altitude.. maybe u can request a new one in 2004, i dont know..
if your on IVAO or VATSIM though, then you will be fine with changing cruising altitudes..