Rails - Jun 2006 - Overriding rails helpers?

Any suggestions? Overriding a mixed in method should be possible, i
just need to know where to find it? Tried setting a breakpoint in my
template rendering code, but lack the ruby/irb experience to get any
wiser.

This may be more of a ruby question, i guess, but someone out there
should know how to override a helper method after before filters are
executed?

Isak