I didn't read ShaneX's topic, but I'm pretty sure he said just like I am going to tell you.
Lemme try to explain it as easy as possible.
1. First you have to find a aura you want, after doing so, go into your AnimusRO folder.
2. Create a folder called "data", if there's one already; use that.
3. Go in that data folder and make another folder, name this one "texture"
4. Enter that folder and make the final required folder, call it "effect"
5. Copy your new aura files (pikapika2.bmp & ringblue.tga (& thumbs? Not sure)) in there.
Goodluck~