WDS questions

Hi, got a few WDS (Windows Deployment Service) questions, hope that someone
can help me out:
1. How do you configure WDS so that you can specify OU for computer object -
just like in RIS?

2. How do you configure WDS so that you can specify computer name before
deployment starts - just like in RIS?

3. How do you utilize multiple answer files for a single image? This was
possible with RIS, you didn't need to create multiple images / folders.

4. When adding multiple Vista images (same build and edition) to be able to
use multiple answer files, disk space is not preserved like with RIS and the
SIS service, can anyone confirm this?

Thanks a lot!