Silent installation of postgres

I want silent, non-interactive installation postgresSQL on Windows.

I don't want to use the .msi provided for silent
installation. Is there any method by which I can just copy
the binaries and run some postgres script which will
configure the Postgres to work same as installed one?

Sure, but you'll have to write all the scripts yourself. To see what the
installer does, the source is on pgFoundry.

//Magnus