Unattended installation with Windows XP Pro

I'm trying to make an unattended installation with Windows XP SP1.

I'm using the Setup Manager for an unattended installation.
I get the unattended.txt and unattended.bat.
For an installation with floppy I rename theunattended.txt to winnt.sif.
So far, so good

Now I want to make a full unattended installation with everything, except
the product key.
I want to make a complete installation without a prompt asking for product
key before installation is done, and you have to log on for the first time.
How is that possible? Where should I put the unattended files, and what do
they have to be renamed before a new burn?

And how can I slipstream an Office XP into that unattended installation from
the same CD (or 2 CD's)?

Thanks

JAZ