Custom validation error messages per rule

[eluser]Ollie Rattue[/eluser]
[quote author="xwero" date="1219196037"]i don't see how it would be different.

Code:

$rules[’password’] = “trim|password|xss_clean|matches[passwordconfirm]”;

[/quote]

How would your method work if it was:

Code:

$rules[’password’] = “trim|password|xss_clean|required|matches[passwordconfirm]

And I wanted to say "You must enter a password" if they entered nothing and "Your passwords do not match" if password doesn't equal passwordconfirm?