moving 11,000 users from Web Wiz ?

I have had some recent discussions with a fellow developer about importing users into Druapl while converting a 4,500 user site from Joomla 1.0 to Drupal 5. Joomla and Drupal both do not store the user password with a salt, so Joomla users can be directly converted to Drupal users. In your case, you need to work around that salt issue.

You could hack the core by editing the user login functions (user.module function user_load), but I don't recommend that.

A good method would be to create your own login block/module to replace the regular login block.

1. Import all user data into the Drupal user table as if your current issue didn't exist.
2. Create a new table that contains just user names and the old Web Wiz passwords.
3. Create a new login block just like the Drupal original, but with some pre-processing.
4. At login submit, check first against your old passwords (adding the salt.)
5. If the user/pass is valid, update the Drupal users table with the password entered. (Maybe delete the row in the old table?)
6. Either way, continue the regular user login methods.

At some point in the future, you could remove the custom login block/module and require the rest of the users to request a new password.

Your passwords are stored as MD5 with a salt. By default, drupal 5.x and 6.x do not salt passwords. There is a module called Salt which will let the admin setup a salt to use on the passwords.

http://drupal.org/project/salt

Simply configure it with your salt, EA17B65, and as long as you migrated all the data correctly your users should be able to login using their own passwords. As the above mentioned about hacking core, I wouldn't recommend this as upgrading would break your hack. Use the module instead.