Aaah the program you want is to go for MSG3 MPD which became available for Classic 747 last year. I am in the process of transposing my 747-200F to this new MPD. basically you will have to do which ever C check, plus CPC you are doing, plus bridging items to bring your program in line with this new MPD.
727, 737Classic also have the option of going for MSG3 MPD as well. B747-400 is mostly MSG3 which makes things very confusing. but is 75% MSG3 if you have the latest rev.
The MSG3 idea is that you combine all the MPD, CPCP, SSID and all the other tasks into one program.
Hope this helps - J