Systems Deployment

You should already have the admin password setup on the base image. In the setupmgr.exe, just leave the password blank. This should stop you from getting the prompt.
The GuiUnattended part of the Sysprep.inf will look like this.

[GuiUnattended]
AdminPassword=*
EncryptedAdminPassword=NO

this is for the local acount correct, I had similar issue with W2k pro, here is my work around. right before running sysprep reset the password to something generic such as "setup01" , then require the user to reset the password at next logon. This also keeps you from having to document the real admin password which can be a security issue. Also use the
[GuiUnattended]
AdminPassword=setup01
line, it went stuck and went throught the automation process. However there was some other tweaking I had to do in the sysprep.inf file in order for it not to prompt. I'm at home now and don't have that .inf file handy but I will post a copy of what i used tomorrow.

OK - I only learned this last week after gifhgting the same issue for 4 days. The sysprep folder needs to be copied locally to the hard-drive and then sys-prep run from their.

The folder i sdeleted on completion of sysprep and you do not get all of the annoying popups asking for what you are seeing.

You may be having some other problem but what you mentioned is exactly like I was getting and this is how I fixed it.

Part of the security aspect of Sysprep is that you cannot reset a password that is non-blank. Meaning that if you have a password set in the image before sysprep it will not be changed during the Mini-Setup. I've heard that occassionally it could occur but, I could never duplicate this. The work around is to reset the admin password to blank right before you sysprep. This could be difficult though if you have any Policy Settings in place.