mrp run based on req plan number

Hi experts,

i have a small problem , in my scenerio we are getting demands of same material through two ways one is as per materials bt demand mangement(mc87 , mc74) and other one is through md61 based on req plan number, we want to have two different planned order of same mat one based on req plan number and other one for the other requiremnt that is given through demand management. after running the mrp is it possible , can anyone suggest , is the user exit EXIT_SAPMM61X_001 User Exit M61X000 helpful , if yes how ?

plz suggest

thanks regards