OPM Accounting preprocessor working?

Hello experts,

I want to know in Details..

How OPM Accounting preprocessor works?

1) At the time of process submission ,sources like

          Inventory Transactions

          Order Managt Transactions

          Product batch transactions

          Purchasing Transactions

          Costing Transactions

I need to select (check) 1 source at a time and Run the Request

or

can i select all at a time..?

And also Give me details about Costing Transactions-

       1. Revaluation Transactions -  

       2. Actual cost adjustment

       3. GL Cost Allocations

      from above which and when will be checked or unchecked???

Please guide me for the same.

Regards,

Kunal