awhh you need to put the additonal ones directly under the existing one in the code.. not after the code.
do it this way... this should work:
<script>
function name_across_board(){
//Created by Agent Moose (smcodes.smfforfree3.com)
var vfour = new Array()
vfour[vfour.length] = ["bugs ownz","вυgѕ σωηz","red","<img src='http://i137.photobucket.com/albums/q232/LaundryLady1947/Runescape/deleteafteriu0.png' />"];
vfour[vfour.length] = ["daffy ownz","daffy ownz","red","<img src='http://i137.photobucket.com/albums/q232/LaundryLady1947/Runescape/deleteafteriu0.png' />"];
for(f=0;f<vfour.length;f++){
$("a[href*='u=']").each(function() {
if(this.innerHTML.match(vfour[f][0])){
this.innerHTML = this.innerHTML.replace(vfour[f][0],"<font color='" + vfour[f][2] + "'>" + vfour[f][3] + vfour[f][(vfour[f][1] != "" ? 1 : 0)] + "</font>");
};});};}
name_across_board();
</script>