When using the portable version of mIRC, in case of client transfer to new computer, the user is left with the hope that the new system will have the same set of fonts as the previous system on the other computer.
I suggest adding an option to mIRC so that can specify the path to a folder with your own local set of preferred fonts that will always be there.
For example, the user can configure: "$mircdir\fonts\". But if the folder is missing or empty, then by default use the Windows system folder with a standard set of fonts.
Can also extend the "/font" command to specify the folder path: /font [-asbegilunkdmz|window] <fontsize> <fontname> [path]