Postgres downgrade

[Norman Uittenbogaart|Webminded]

I upgraded my postgres without dumping my data and reimport them, so now 
my database won t start,

> [root at cp root]# /usr/local/etc/rc.d/010.pgsql.sh start
> pgsqlFATAL: database files are incompatible with server
> DETAIL: The data directory was initialized by PostgreSQL version 7.3, which is not compatible with this version 7.4.2.

Now how can I downgrade from Postgres 7.4.2 back to Postgres 7.3 without 
loosing my data ?
Would a make install in /usr/ports/databases/postgresql73 be sufficient ?

Please help !!!


Norman Uittenbogaart