[otrs] Signing outgoing email tickets

[Henry]

Greetings everyone,

I'm using OTSR 2.3.1.

I'm trying to configure OTRS to sign all outgoing email tickets using it's
PGP facility.

I've followed "How to use PGP (OTRS >= 2.0.x)"
http://faq.otrs.org/otrs/public.pl?Action=PublicFAQ&CategoryID=5&ItemID=78
as closely as possible, but the option to sign an email ticket is nowhere
to be seen thereafter.

I've created the keys as the otrs user, etc.
The Sysconfig->Crypt::PGP config I'm unsure about.  The FAQ mentions:
"o PGP::Key::Password -> passwords for private keys ->
secret_keyid -> password "

but I'm not sure what to stick in the two fields:
Key:      (the 9 char hex string as displayed by gpg --gen-key?)
Content:  (no idea what to enter here, fingerprint/passphrase, something
else?)

Any pointers would be appreciated.

Regards
Henry