I used to recommend GPGWIN's GPA software (bundled along with Kleo usually). Now I recommend GPG4USB. It's like having seven league boots for PGP.http://gpg4usb.cpunk.de/download.htmlHowever I am wondering why an anonymous person is using PGP signing for the transaction of an illegal commodity?Signing proves you, the person with the private key, is the one who bought the illegal product! If they get you and the private key, they have insurmountable evidence if you sign your messages. Don't sign your messages! In this instance there is no reason to, there is a reason not to.Just use encryption. You use signatures to prove that you are the same person as before or to ensure the message wasn't interfered with.