Nameplate castbar addon modified to show nameplate castbar on all nameplates (even non targeted ones) using awesome_wotlk patch. Works with every nameplate addon
You can change the position of the nameplate castbar on this part of the code : CastBar:SetPoint("TOP", namePlate, "BOTTOM", 0, 0)
Just change the last 0 to the position you want
Modified version of PlateCastBar made by Schaka here : https://github.com/Schaka/WotLK-AddOns_TBC