it looks like the Section 6-25 of the FAQ hasn't been updated in a while since it still talks about the 16 and 32 bit version of mIRC. And running multiple copies of the same.

The instructions appear not to work. I created a new shortcut to the mirc.exe file in Program Files(x86) and created a new mirc.ini file in users\myuser\appdata\roaming\mirc

However, I get an invalid file/path anytime I try to update the Target filed or Start in fields of the properties of the new shortcut. To have it point to that ini location.

There are indeed many sections of the mIRC FAQ that have not been updated in quite some time. This FAQ was created many years ago by Tjerk Vonck. I haven't had the time to update it myself. If anyone wants to give it a go, let me know.

As for creating shortcuts, you can find a list of command line switches you can use in the mIRC Help file, Other Features/Command line section.

You can also try wikichip.

https://en.wikichip.org/wiki/mirc/virtual_profile