Windows 7: Default user and Registry Questions

Hi I got some questions and was thinking someone here might have a good solution or some answers.
I get systems in to finish up the imaging install at my work and I thought it would be a good idea to put in the Default User profile a batch file that would do a couple of things for me when a user logs in.
The things I would like this batch file to do is put some registry keys in when ever a new user logs into the system like say Sally logs into the machine it runs the batch file once makes the changes to her profile. Then Frank logs into the machine then the batch file runs again once. Is this a good idea to do it this way?
I want to do it this way because it is the only way I can think of doing it because I do not have access to the image that the systems come in with nor do I have active directory access or control.
Now I do need some clarification on what is the best way to do what I want to do so here is what I would like to do.
I would like to know what reg keys I need to change for Windows 7 machines to always have the Menu bars visable (file Edit exc) and the System Tray icons to always be visable.
The other thing is that whenever a user starts Outlook they put their PST files in the default location and not in there My Documents folder. Is there a way to edit that location?

Thanks for your help