I need to create a script to change the guest session defaults because the computers I installed Ubuntu on have only 448mb RAM, which is not enough to have two sessions running simultaneously.

I want to write a script that will...

• create the guest-session folder in /etc;

• create the skel folder in /etc/guest-session/;

• copy all the content (including subfolders and files) in /tmp/guest-xxxx/;

• paste all that content into /etc/guest-session/skel/; and

• change the default desktop to GNOME Classic instead of Unity 2D (this can be separate from the script if it's easier to do as a general setting),

...all within the guest-session.

This is for a project installing Ubuntu in cyber-cafes so it's critical to the project. I appreciate any help you can offer.