Reg:Strored procedure and script logic

Hi Experts,

                 I am new to Microsoft BPC. can you clarify the following things,

  1. I am going to create a new SSIS package with input as variables and i need to get the data form the cube depending on the parameters and do calculation in stored procedure.

           For this, if i call the package to a scriptlogic file and call the stored procedure from there. Can i pass data from the script logic file by scoping dimension (*XDIM)?

2. If the above option is not possible, and if i need to get data in the using SQL in stored procedure then which table i should consider for querying WB,FACT,FACT2? sample code

3. After doing the calculation  which table should i insert it back.. is there after SSIS component to do this ?

Regards,

Vikram