It's not that old of a topic, so don't worry. Generally if a topic is 6 months (or more) in age, bumping it is not recommended.

In response to your query, here's the updated
Code:
 on @*:text:*:#:{
  var %messages = 5, %time = 3
  inc -u $+ %time $+(%,flood.,$cid,$chan,$wildsite)
  if ($eval($+(%,flood.,$cid,$chan,$wildsite),2) == %messages) ban -ku300 $chan $nick 2 4Flooding - 5 lines in 3 seconds.
}