Flash Media RTMFP Editions

I would like to know which Flash Media Edition supports RTMFP? I know Flash Media Enterprise supports RTMFP but that's unfortunately out of my price range. FMS Streaming server doesn't support either RTMFP or ip multicast. My question is...does FMS interactive server support RTMFP? I have read reviews but i found them rather confusing. If someone can clarify this for me i would appreciate it before i decide to purchase the edition.

Thank You