PGP and IPSec

Hi, is there an established way of using PGP to assist an IPSec setup? I only found this here http://tools.ietf.org/html/draft-ietf-ipsec-openpgp-01 But it does not seem to be fleshed out. I could imagine to use PGP to create a single connection which is then used to communicate a shared key which is then used for IPSec setup. I somehow think it should be there but have not seen it. Regards Peter