Use RA with caution, if you ever need to run Real Player.
RA will mess RP up and not allow it to load.
I tried it several times. There were times that I needed RP. I had to uninstall both RA and RP. Even then, RP would not install right. I finally had to go back to v8, install it, and let it update itself.
Media Player Classic now plays some of the RP formats. I have never had a problem with MPC.
Both MPC and RA are open source freeware programs.
Why would you ever need RP if you have Real Alternative?
Just curious.