Um, I don't believe the list he posted is a list of running dlls, but a list of all exes detected in the directory. Notice that mIRC appears twice.
What I am saying is that the script in question will still crash even if you delete those dlls, the actual problem appears to be in mIRC itself.
Also, it does not appear to be in the script, or any specific script action that causes the crash due to it's random nature. It looks like a buffer overflow or specific exploit of some kind.
Also see: http://www.sysreset.com/phpbb2/viewtopic.php?t=1308