Hi Bianca,
if the EPD is in ILCD+EPD format, you can simply import it (file / import / file, then select the zip archive). You will get an EPD with results per life cycle stage, which you can use in your own models.
Best wishes,
Andreas
- be aware that published EPDs in "digital format" (i.e. ILCD+EPD) are often somehow funny, I assume since they are rather produced than used so far by those who create them