Disabling built in nUI features to replace them with other mods is not supported. nUI is one tightly integrated mod and doing so usually breaks things... it is also against the entire design philosophy of nUI. There's a FAQ on it here:
http://www.wowinterface.com/forums/s...ad.php?t=23943
As for moving the player and target buffs, that's a non-trivial thing in nUI5 though it can be done. You need to edit [
Interface > AddOns > nUI > Layouts > Default > UnitPanels > {panel mode} > nUI_UnitSkin_{panel mode}{unit id}.lua ] where {panel mode} is one of Solo, Party, Raid10, etc. and {unit id} is one of Player, Target, Pet, Vehicle, etc. Locate the
["Aura"] section somewhere near the bottom of the file and play with the
xOfs and
yOfs values to move the aura displays left/right and up/down respectively. You'll see other options there you can play with to modify the aura display, as well.
You might also look at the nUI_AuraButtons plugin in the "nUI: Unit Panel" section at
http://files.nUIaddon.com for an alternate display of player, pet and target auras.