making an outline of a character

how can i do this

http://www.ownage.nl/images/content/21502.jpg

thanks …

3DGURU

ok , don’t say that i have to rap the geo with another one with flipped normals then the flipped and sized one should be orange

i know this trick

but what i wanted is

the outline appear even if the character is behinde a wall or any obstacle … bye