Changing the email address on an existing key...how? Should I?

[highspeednodrag at comcast.net]

Is it possible (or advisable) to change the email address on an existing pgp 
key?

I'm using GnuPG 1.4.1 on Linux. The man pages do not show how to change or 
edit the mail address of an existing key.

I've had the key(s) a long time and friends use them. I use the same key on 
several platforms. It would not be too much hassle for me to just create 
another key with the correct mail address and distribute the public key.

What is good practice in this regard and where might I read more about it?
TIA.

Or, should I just add a user ID to my existing key so several mail addresses 
are included in one key?


-- 
Heisenberg was right, I think.