How to re-own db cluster

Hello,
I was trying to install a student information system called Centre which failed to connect to postgres for reasons I have still been unable to isolate. In order to restart the entire procedure of installation of database and Centre, I removed the 'postgres' user and group that owned the database and then readded them only to get the following error:
"Stopping PostgreSQL 8.3 database server: main
Error: The cluster is owned by user id 110which does not exist anymore
failed!"
How can I re-own the cluster? I cannot uninstall the postgresql-8.3 deb using 'dpkg --purge postgesql-8.3'? Reinstalling gives similar configuration errors. I use Debian 'Lenny'.
Thank you.
Regards,
--
Vikram Vincent
+919448810822
http://www.swatantra.org/
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