Creating a side box to Advertise a SALE

Hello all, Im VERY new here. I have been searching for awhile. and I am confused.
Can someone show/help me add a banner/side box used only when I am offering a special/sale.
For example
HAPPY NEW YEARS SALE
I would like it to show up once they access my pro shop. But I don't know what the heck I am doing, and I don't want to screw it up.
I would like to remove the banner/box once the sale is over.
Any help would be greatly appreciated.
thanks

There is a download availabe at http://www.zen-cart.com/index.php?main_page=product_contrib_info&cPath=40_52&products_id=686 which enables you to add your own custom sidebox which you can then turn on or off using the admin. Instructions are included with it.

PGlad:

There is a download availabe at http://www.zen-cart.com/index.php?main_page=product_contrib_info&cPath=40_52&products_id=686 which enables you to add your own custom sidebox which you can then turn on or off using the admin. Instructions are included with it.
Has anyone tested this on 1.3.8? I would like to install but want to make sure it's compatable.

Yes it works in version 1.3.8

Why not just create a banner ad? You could create several to fill the same banner box and that might get more attention than a static box. Set a link to a sale category or specific product if you like.

Schedule them to appear for the duration of your sale.