It would be helpful to add the proper terminology.There are fonts,they are'nt plug-in's,I am not sure if this work's for paint because i have been using a diff program lately but i open the font instead of saving it ,then I go to Computer>Window>Fonts and I drop the file into my computer font there and my program reads it as a computer font,actually I just tryed it and my added font's are in paint so ya,you might try it that way.