Cognos 11 and IIS with ARR

[ilikebundy]

Sorry up front but I am thoroughly confused with the need for ARR in IIS.  :'(
I have Cognos 11.0.13 installed and IIS setup and working (not SSO site)

I have been told that I need to install ARR in IIS for Cognos 11 to work correctly.

Could someone please explain to me if this is correct and or why ARR is required for a non SSO cognos 11 install

thanks in advance

Mike

[ilikebundy]

Sorry everyone. 
Found this which answers my question:
https://www.cognoise.com/index.php/topic,34681.0.html