multistore sharing the same URL

[SylvainG]

I'm working on a catalog (no online purchase).

I'd like all vendors being able to manage only their products in the backoffice.

 

On the front, I only want to have one url : the default shop of the group. So the default must display products from all stores.

 

Untill now and with overrides, I found a solution for :

• displaying all the products from all stores in a category : here
• layered navigation : filter products from all stores : here
• StoresController : display all stores from all stores : here

 

My problem : the product page is still redirecting to the virtual url.

 

My questions :

 

Is there a way to override productController or class to display a product in the default shop even if it belongs to another one?

 

the big one: is it possible to have multistore sharing the same URL?

 

 

Hope for an answer or an advice or a simple "have fun!"