Help needed defining timestamp format for input?

Hi,

I've been given a dataset (from Sybase) which has the timestamps
expressed as
"Jun 26 2002 12:18:56:903PM"

I'd like to use copy in Postgres to load these data, but can't see in
the (v8.1) docs
how to specify this format for Postgresql.

Can anyone help with this?


Thanks,

   Brent Wood