I haven't really tried to do this so this is probably wrong (and don't really have the time to look indepth at this atm) but if you can figure out where variables are being replaced and split the name variable on spaces and return that value you will get what you want.
and add (around line 60) the following code:
function getFirstName(){
list($first,$last) = explode(' ',$this->ht);
return $first;
}