If you just cut and pasted this part,
Code:
<div>$post[icqicon] $post[aimicon] $post[msnicon] $post[yahooicon] $post[skypeicon]
<if condition="$post[field5]"><img src="http://forums.editingarchive.com/images/newsposticons2/wii.jpg" alt="Wii Friend Code: $post[field5]"></if>
</div>
You need to look at the field number for your Wii code field. If it isn't field5, nothing will show when you over over the Wii image.
You'll have to see what the field number is in your profile fields manager and edit the template again to change it from field5 to whatever field number it is.