Check out the WineHQ Database entry for mIRC:
http://appdb.winehq.org/objectManager.php?sClass=version&iId=12568Specifically, use WineTricks to get some things, such as Riched32.
Also, to fix the list redraw issues, I've written a script:
http://code.google.com/p/winefix/source/browse/trunk/winefix.mrcRegards
JD