sara tcode

I need to run the sap standard transaction SARA every month over night. However the variant i need to use will change each time. I want to automate this process. Effectively i will be selecting those sales orders that the business has agreed to archive. I can do this in the abap. However I do not want to run the underlying code in sara as sara provides archive management facilities that will be lost if i start calling code dynamically. Hence is it possible to create variants within abap against the transaction sara that i can then call overnight. Any help is much appreciated and hopefully one day when my knowledge base improves i'll be able to reciprocate.