Mergin a old dir with current system

Hi

I've got a dir containing a valuable 6.5x db with one table, but I
foolishly upgraded to 7.0 without pg_dumpall:in first.

I tried going back to 6.53, vreated the db, then copied the backup to the
place, but psql can't see the old table.

Is there a way to merge the old stuff to newly created db?

--Jyry
"Epäonnistumisen riski on suuri, kun kyvytön neuvoo halutonta
tekemään tarpeetonta."