Same Paypal Account For Diferent Stores

Hi, we have several stores with the same account of CS-Cart. All works fine, but with paypal integration, when the checkout button is pressed, all my customers, from all stores (each one with diferent URL) loads the same (localized) paypal page, but with the same name at the upper left (red box).

We need each store present its proper URL, not the principal one like now.

After speaking with paypal, they told us we ned to set the "image_url" variable for each store, but how could we pass this variable from paypal (cc_outside.tpl template)? Is possible to mdify this empy template with a form passing the data??

I hope you could help me?

Best regards

paypal issue.jpg