This is the simplest, as they are already recognised by your computer, so you just install them in the normal way for your computer system (usually double-click on the font file and selectfrom the menus.
On Windows systems, the fonts are made available automatically; on UNIX & GNU/Linux systems, including Apple Macintosh OS X, run the fc-cache utility to give XƎLATEX fast-load access to all the fonts you have installed. Run the program like this:
It can take several minutes, especially if you have a lot of fonts. Once it has finished, you can query the database with the fc-list command and grep for the string you want:
fc-list|grep -i comic|sort /home/peter/texmf/fonts/type1/comicsans/rcomic8r.pfb: Comic Sans MS:style=Regular /home/peter/texmf/fonts/type1/comicsans/rcomicbd8r.pfb: Comic Sans MS:style=Bold /usr/share/texlive/texmf-dist/fonts/type1/rozynski/comicneue/ComicNeue.pfb: Comic Neue:style=Regular ...