Is IIS required for EV reporting on SQL 2008 R2?

Small challenge: I'm trying to put EV reporting (9.0.2) on a 2008 server with SQL 2008 R2 and Reporting Services.  The installation fails as IIS is not installed.  SQL 2008 R2 has its own web service and no longer needs IIS.  I'd rather not run two web services side-by-side if it can be avoided.

Has anyone experienced the same problem?  Is there a way to set up EV reporting without installing IIS?

Thanks for the help!