If you read the first few paragraphs of
http://gborg.postgresql.org/project/mysql2psql/faq/faq.php?faq_id=181
there is told how to install 2 different postgres servers on the same
system, running at the same time, out of different clusters and using
different ports.
It's written for another purpose, but the instructions for the above take
up the first bit of the explanation of how to do something else.
joseph.
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