Further questions about Vista should be asked in a Vista newsgroup. This
group is for Windows XP.
Putting Vista in a "classic" theme mode will remove much of Vista's
graphical user interface functionality. I don't recommend it. Further, you
do not do people favors when teaching them how to use an operating system
by making it look like a different operating system.
Either teach the seniors to use XP or teach them to use Vista after first
making sure you are qualified to do either. I'm not saying you're not and
I'm not saying this to be hurtful, but based on questions you've asked in
various MS newsgroups you should be sure that you really know what you're
doing before taking on the job of teaching/helping end users.
Malke