(cannot run as root)

 http://www.enterprisedb.com/products-services-training/pgbindownload
      "Binaries from installer version 9.2.1"

-- to use, unzip the pgsql directory somewhere, and cd into it:
      cd pgsql

-- run initdb:
      ./bin/initdb -D 9.2/data

-- start postgres:
      ./bin/pg_ctl/ -D 9.2/data -l logfile start

-- run tests...

-- to stop, close all connections, then:
      ./bin/pg_ctl -D 9.2/data -l logfile stop 

-- cleanup all  files

Hm, I don't know - possible but error-prone, probably...