customer change upload program

Hi,

I need to build a customer change upload program of XD02 , I need to take care of the following tabs fields value like unloading point , contact person ,payment transactions and in the header tab like sales area data and customer field data and especially in unloading point tab i need to accomodate goods receiving hours fields value is there any bapi or funtion module available for accomodate all this tab fields ,pls kindly help me out for this conversion program.

Thanks

Ravi