Sending email with body and attachment from I/action Templat

Hi guys,

I searched the forum but found little on the matter.

The question is as follows:
In the Marketing module from a Segment the normal functionality allows to attach ONE file only to an Interaction template and use this file as EITHER a template for the body of an automatic email OR as an attachment.
What I ask is if it is possible to customize the system in such a way so as to have ONE attachment used as a template for the body of the e-mail and a SECOND one to be used as an attachment in the email message itself.
I asked our developers but so far they have some difficulties. Does anyone have any ideas on how to achieve this? Is anyone else working (or has already worked) on a similar issue? Any workarounds that do not require copy-paste texts in several hundred emails? Or if it isn't possible - it is also an answer after all ?

Thanks in advance.