the PKCS#12 objects for Alice and Bob in draft-dkg-lamps-samples-05 each contain two secret keys -- one for signing, and one for decryption.
However, when importing that file with gpgsm, i see the following output:
gpgsm: already got an key object, skipping this one
here's another copy of the bundle for Bob. It is locked with the simple three-letter passphrase`bob`: