Running CF in an ASP environment

I have been running CF pages on our Windows 2003 server for some time.  The pages have been very popular, and my company has asked that I include them on our corporate web site.  However, the corporate web has a login authentication process that is based on an asp code.  It would not be practical to request the visitors to authenticate a second time.  So I have to ask whether there any way that I can cfinclude or use some other technique that will allow the asp authentication code to run when a CF page is executed?  If not, is there a way that I can pick off the cookie created in the asp routine and somehow use it for authentication purposes on my coldfusion pages?  Or can I pick off the session variables that are created when the users enters the corporate site and use them in the CF login routine?