Add Comment lines into a PGP encrypt Message

Dear ladies and gentlemen,

maybe / hopefully you can help us regarding follow question:

Is it possible to add Comment lines into a PGP message file like:

-----BEGIN PGP MESSAGE-----
Version: BCPG v1.46
Comment:
Comment:

hQEMA4.......
----------END PGP MESSAGE----

If I encrypt the message at the moment with our PI PGP Module, I get only back the the PGP Message without
the Comment Lines.
Our environment we use SAP PI 7.31 with B2BAddOn SP04.
Thanks for your help