Help on using IIS app user to access another IIS with authentication server level

Hi guys not sure wether my topic is specific enough. But my scenario is :

IIS1 Public server

IIS2 limited with Windows Authentication

now what im looking for is to get IIS1 app pool user to used when a user is requesting a url like :http://IIS2/Images/brand.jpg

from IIS 1 and i dont want to have the user needing to fill in login info and avoiding them getting the login dialog box entirely i need this to be done on server level.  so instead of the user asking the server is asking for them and providing the picture needed.

is this possible ?

thanks in advanced.

jens simonsen

picopublish