Overriding the default humanize translation?

I've been trying to find a way to natively modify the human
translation of a field name for error reporting purposes. I found
this plugin:

http://svn.redlinesoftware.com/plugins/human_attribute_override

Is there anyway to do this without a plugin?

I'm the developer of that plugin.

Trac seems to be down, so I can't refer you to the ticket that spawned
this plugin, but my patch was rejected due to parts of the human
attribute functionality that's currently in rails being deprecated in
rails 2.

So afaik, using the plugin is the only way to do what you're looking
for now and in the future.

Andrew