I wrote a DLL for mIRC, its named mIRC-HZ (do a google on it)
the DLL allows users to convert GB/Big5 to GB/Big5 with a simple script and calls to DLL, just use your imagination to create your script (a sample script is included in the zip)
and, since we are in BUG section, i doubt that moderators will allow me to do a such auto-promotion here.
To solve this <<problem>> of displaying Big5/GB on the same win, you have to wait for the next generation of mIRC which should <<I HOPE SO>> support the UTF8
