jpjones - 11:32 am on Jan 6, 2003 (gmt 0)

You need to use the command line program htpasswd.
Syntax is as follows:

htpasswd /path/to/.htpasswd <username> <password>

That will then add a new user to the file with the correctly encrypted password.

To change the password you're probably best off deleting the current user and then using the above command to create the username again with the new password.

HTH
JP