<error> handling

I'm experimenting with adding <error> style error reporting to my 
Parse::RecDescent grammar.

My first question is: is there some standard way to overload the
handler that actually displays the error messages?  Alternately, can I
make P::RD not print the messages to stderr, but instead leave them in
a buffer than I can poll?

My second question is: without using <error>, is there some other way 
of finding out how deep P::RD was able to get into my text before it 
failed?

Thanks bud,
Jonathan.

-- 
Concrete is heavy; iron is hard -- but the grass will prevail.  -- E. Abbey