hasAggro Flag?

[Troox]

In my old RaidFrames there was a hasAggro flag, used to change the Unitnamecolor to RED if a Unit has aggro. Is this "old" status reproduceable in 5.1? The old method used (if i remember right) was "Unit in Set -> hasAggro" pretty old i think. Last time i'm raiding was in Wrath of the Lich King. Its pretty nice as a Healer to see if someone in the Raidgroup pulled aggro

Second thing... Can i create Ora2/3 like Maintank Frames/Targets with RDX - maybe created my pharsing the Role choosed by the Player?
thanks