Is it possible to mod the visual effect of flesh spells (like Iron Flesh) in game?

To be specific, I would like to see a sphere-like energy shield enveloping the player. When you get hit, the sphere would flash.

Like this one:

[img]http://3.bp.blogspot.com/-1ckD1IVPmck/Ta_ms6cNVqI/AAAAAAAAAqk/UYaX0oYt0Io/s1600/fantastic-force-field.jpg[/img]

Thanks.