ioGuiExt.ini is only used for an alternative windowname incase someone wants to run 2 ioFTPD.exe's in the same windowcontext.
windowname=ioFTPD::MessageWindow2
There is no readme.txt in the zip but it is explained in the ioGuiExt changelog @
http://www.inicom.net/pages/en.ioftp...pts.php?id=108