I would just use the built-in messaging system on the main site instead of messing around with torpm. Just click the username of a person you want to send a message to. You can't change your username on Silk Road, but you can create a new account with a new name. You can change your password on your settings page. "Does the option to change identity on TOR affect your identity on silkroad or the forums" No, it doesn't. There is a good PGP tutorial going in the security board and we are going to publish a comprehensive guide created by a member of the forum soon.