GPG with current PGP keys

[Gamma Pi]

Thanks for all the advice received from the list. Now I can use my old
PGP keys created with PGP 6.5.2 on Windows with my current preferred
configuration: Linux, Xemacs 21.1.8, Mailcrypt 3.5.5, GPG 1.0.1. I was
not able to do so before for a mix of different things, a) I was
testing on messages encrypted with IDEA which is not supported by GPG,
CAST is OK. b) for some reasons mailcrypt does not like passphrases
containing the character @. After changing the passphrases for all my
ids everything (seems to)work!