Download a grf tool
Extract sdata/adata (I can't which one had asura text bu I think it's in sdata) Alternatively you can only extract the asura files if you manage to find a good GRF tool.
Go into Data >> textures>> effects, (if it's sdata then the files will be in korean so have fun searching =D) Then find the files asura1 through asura6, and asura11 through asura16. Make backup copies of all these files. The repack your sdata/adata if you unpacked the whole thing.
Then make one more copy of the duplicate files you already had and open them up in some image editor. Release your obviously gigantic artistic skills and make some uber leet hax asura pic.(asura1 should be the same pic as asura11, asura2 the same as asura12, etc).
Save the things.
Then make a data folder inside your RO folder if you don't have one. Then make a folder called textures in there, then a folder called effects. Then drop all the files in the effects folder.
Run RO and hope you didn't phail at any point.
Enjoy your asura text that only you can see anyways.