IIS map general url to servername/application

Hi,

Please see http://social.technet.microsoft.com/Forums/en-US/b1a5f92e-861a-4397-ac62-4e0f22b6a370/sccm-2012-application-portal-config-questions?forum=configmanagerapps

In short: I need to map http://application.ourcompany.com/ to http://servername.ourcompany.com/pathtositeonserver/
However, I cannot impact functionality of the server (SCCM 2012).

Please advise howto.
J.