backup using pg_dump postgreSQL 8.3.8

We have postgreSQL 8.3.8 installed on a windows 8 server (64 bit).

We want to be able to run a nightly backup using the pg_dump command.

Unfortunately, even with the pg_hba.conf fix of adding host postgres ...
trust,

It still asks for a password.

1. Is this a 64bit issue? If the server was 32bit, would it not ask for
a password?

2. Is there a way of running a dos script that would run the pg_dump
providing a password when prompted?

3. Is there a way of running the pg_dump with a user that doesn't have a
password?

Thanks

Sandy Test

System Manager Makhteshim

IT

Makhteshim Agan Group

tel:972-8-6296823 fax:972-8-6296043

sandy.test@ma-industries.com