OEM installer

I just did some testing with the OEM installer:

http://loktarogar.blogspot.com/2005/10/using-ubuntu-510-oem-mode.html

worked fine so far. But some questions:

during installation it asks for a password. What is that good for?

after installation is finished there is a option to run a hardware checker. I 
did that and found for example, sound was not playing. But after I booted up 
again and created a user account sound was ok. A bug?

Also missing is a option for some branding. Change wallpaper and stuff like 
that. I am able to do any testing as I am working in a testlab with access to 
various laoptops.

Thanks for any help

Thomas