Put this in your popups nicklist:
Code:
Greet All:var %x = 1 | while ($nick(#,%x)) { if ($nick(#,%x) != $me) .timer 1 $calc(%x * 2) say Hello $+ , $v1 | inc %x }
Then right click for 'Greet All' to activate the script. There will be a two-second delay in greeting, in case of flooding.