A neat feature of Visual Studio 2005 is, when using CONTROL-TAB a dialog is displayed in a simular way to how ALT-TAB works. It would be nice if mIRC supported such a feature. Windows could be sorted in to columns based on what CID they belong to.
I wrote a DLL that can do this. It allows complete control from scripts on how the dialog is designed. It includes an example of how to use the DLL. There is DLL support for determining the z-order of windows, although I haven't implemented it's use in the example script. Control-Tab Dialog download or visit my main page.