BUMP ?

[D.Kruger]

http://img705.imageshack.us/img705/3094/notmsn01.jpg (http://img705.imageshack.us/i/notmsn01.jpg/)

http://img3.imageshack.us/img3/6238/notmst01gal.jpg (http://img3.imageshack.us/i/notmst01gal.jpg/)

http://img192.imageshack.us/img192/4326/sh32010020721231721.jpg (http://img192.imageshack.us/i/sh32010020721231721.jpg/)

http://img21.imageshack.us/img21/8923/sh32010020722063910.jpg (http://img21.imageshack.us/i/sh32010020722063910.jpg/)

I want to put the BUMP texture, but do not know how, help me understand how much they effective?