That's interesting. Could you elaborate a little bit on how that works?
I'm not sure how much you know about the editor so I'll just start from zero.
Open up the Run dialogue box and type "eudcedit.exe".
When that starts you get to select the code for your character. If you already have private characters you can select those for editing.
Once you're happy with your character, you can just save it. You can also save a copy of it to another code, if you like.
Now the character is set to be applied to all fonts by default, meaning that it will be recognised by any program using the fonts you already have on your system, whatever font that is.
But if you want to apply it to a specific font (e.g. Times New Roman), then you need to head to "File>Font Links..." and check "Link with Selected Fonts". That's it.
Now when comes the time to use it, you need to open "charmap.exe" and go to the font selection drop-down near the top of the window. If your character was applied to all fonts, then choose "All Fonts (Pricate Characters). Otherwise select the font that is specific to your character (anyway make sure you're using the Unicode character set; it won't appear otherwise).
Now just select the character, copy it, and that's it. I think you can also access it using the Alt+Num keyboard shortcut that's specific to your character code, but I'm not 100 % sure.
Hope this helps.