Wow...that looks exactly like the nick and channel manager I wrote for Skyline mIRC; http://www.skylinechat.com/downloads.php?do=file&id=7
The name of the dialog is the same...same named hash tables, same named alias...even the same comments of the same code.
Thing is...that was written as part of that full script, so fits with the folders inside it, not as an addon that you can rip. That be why your getting an error on line 71.