It seems DCX also uses IE as the internal browser
The worst part about using IE as the browser, is that if you design anything in it, you don't know how it will show on the next computer (uses internal version of IE)
However, allthough its about 16mb in 2 required DLLs, Chromium Embedded <
http://code.google.com/p/chromiumembedded/> includes the whole browser (so you would be able to make sure everything renders as you designed it)
The issue is creating a mIRC DLL that can communicate with the two DLL's (I can't do it)
icudt38.dll
libcef.dll
These are the two files that are distributed with chromiumembedded, and there is a cefclient.exe that communicates with this, and provides the browser "chrome".
I'm fairly sure that someone could do it without hassle as it's all open source, and mostly done for the person already... anyone?