AdiIRC

Don't see a reason why it shouldn't work, doesn't seem to do anything special.

I'll try again but it looked like it didn't open the query window, it printed all the msgs in an open chan window (without actually sending the msgs).

edit:
Same, it prints the whole query in the open chan window.

kr0n, the issue with this is the ON OPEN event...

if you're using ON ^*:OPEN:?:{ echo -a $target } -- it returns the current window name you have open (which is wrong.)
if you're using ON *:OPEN:?:{ echo -a $target } -- if returns the nickname of the person who is sending you the msg. (which is also wrong) 

the correct value here should be $me

using ON ^*:OPEN:?:{ echo -a $target } -- should return $me