Hi Cherubini, you need to create a separation between those modules using JavaScript (based on screen resolution) so, the added products would go to the correct cart.
I must say, what you are asking is highly a custom modification. Unfortunately we don't provide free support or step-by-step instructions for custom coding modifications.
You may purchase premium support:
www.flexiblewebdesign.com/premium-support
and let us take care this modification for you directly on your website though.
Regards.
Support