The if condition to check if the hash table exists isn't needed because one has to reopen or restart mIRC for the start event to be activated. A Hash table is merely obliterated upon closing or existing mIRC.
Also, the $hfind() command can do the wildcard searching instead of go the extra mile with $gettok, $puttok and a while loop...
This is my constructive criticism; in no way do I intend to be cynical to comment on your approach in the code provided.
