Trying to find the correct MPS / MRP setup...

Currently have the following basic situation:

Finished good "A" (packaged item).  BOM has multiple components, including component "B".
Finished good "B" (bulk item).  BOM has multiple components, including component "C".
Finished good "C" (intermediate item).  BOM has multiple components.
All three finished good items are stocking type = M, planning code = 1 and forecast type = F.
All other component items are stocking type = P, planning code = 2 and forecast type = G.

There is an independent forecast (i.e. production plan) uploaded into F3460 for A, B & C.

There is a business desire to manually plan each finished good, having MPS generate messages equal to the forecast uploaded (i.e. NO dependant demand).    There is also a business desire to have MRP explode the BOM and generate component purchase messages.