MASS Change Scheduling Agreement Schedule: Delivery Schedule for Item

Hello experts, 

My lawsuit has a request of MASS updating Delivery Schedule for Scheduling Agreement Lines.

Similar to the process of accessing ME38, selecting an point and going to Delivery Schedule button. But they privation to bash this massively for much than 1 Agreement astatine a time.

I tried utilizing MASS and BUS2013, but I spot the lone tables disposable to wide alteration are EKKO and EKPO. If I'm not mistaken, the array that stores the Delivery Schedule information is EKET. 

They privation to beryllium capable to alteration Item Delivery Date (EKET-EINDT), Item Scheduled Quantity (EKET-MENGE) and truthful on.

I cognize SAP doesn't urge to alteration the Business Object and adhd Table/Fields. Is it imaginable to execute this request successful a modular way?