AD Auth for reports is accomplished by renaming an xml file that should be specified in the product docs.
you don't get single signon. you have to type in your AD credentials to the reports web ui - like Bob.Smith@DOMAIN.COM (it's case sensitive)
unless something has changed recently, you will have AD or SRP, not both.
if you have an AD user in the BLAdmins and RBACAdmins roles why do you need the BLAdmin or RBACAdmin account?
Bill, I did jump the gun a bit. The Admin guide does in fact talk about modifying the authentication.xml to get the AD integration. I was trying to have the best of both worlds, AD and SRP. You may be right that you can't have both.