Make XTCommerce design responsive

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
We use an Fork of XTCommerce (which itself is a fork of OSCommerce) with a self-made design.
I need to have this design converted to be responsive.

It should fit:
Mobile phones both ways
tablets both ways
Computers = the same as it is now.

The tweaks for that goal should be done for all the template-files. You will work directly on our server in the dev area.
It should be possible to restore everything back to how it was before it was responsive, in case I see a drop in sales.

Version: Zen Cart [url removed, login to view]

Additional Project Description:
07/25/2013 at 9:29 CEST
No Zen Cart - Sorry for misinformation.

Skills required:
About the employer:
Public Clarification Board
Bids are hidden by the project creator. Log in as the employer to view bids or to bid on this project.
You will not be able to bid on this project if you are not qualified in one of the job categories. To see your qualifications click here.

$ 257
in 5 days
$ 222
in 5 days
$ 237
in 5 days
$ 237
in 11 days
$ 123
in 8 days