I created one but I'm always looking for ways to improve it. Its fairly easy to add classes, its like so:
$isclass["runner"]=1;
$Class["runner","Datablock"] = nametoid("PlayerRunnerArmor");//his datablock
$Class["runner","Weps"] = "RPistolItem pushhammerItem";//his weapons
$Class["runner","Scale"] = "0.9 0.9 0.9";//scaling
$Class["runner","ChangeMessage"] = "\c2You will spawn as a \c0Runner\c2.";//spawn message
$Class["runner","HelpMessage"] = "\c4 Runners are swift and agile-- but are also weak";//description