Subfolder with different theme but same installation

[enconte]

I need to have two folders, one for common users and one for companies, and both should have the same database and prestashop installation but use different themes.

 

For example a user can access:

http://www.mydomain.com/product.php?id_product=3

 

and he should see the same as another user in:

http://www.mydomain.com/company/product.php?id_product=3

 

except for the background color, etc.

 

Is there any good way to do that?

I tried with .htaccess but it is forcing a redirect in the url to the base url. I'm not using the R parameter.

 

Any help will be much appreciated.