> It appears that most of the class files don't exist in the form of a > rpm. In fact, some of this stuff doesn't seem to be downloadable as > a .cls file (which is the format that lyx expects to see). Somehow > (that I haven't yet read up on) you are to convert a tex file that > you download from a random ftp site into a cls file and that goes > into a directory that lyx can see. > > Obviously, I have some more reading and figuring out to do here. A > lot of this stuff was apparently never packaged for easy installation > on a rpm-based system. > LyX is just a front end GUI editor for LaTeX/TeX. You could try installing some other TeX packaging system - on CentOS7, that would be texlive - and that will give you many of the other files and classes you may need. Other non-packaged files can be downloaded from CTAN. I think what you need to get your head around is that these aren't "LyX files", they are "TeX/LaTeX files" that LyX uses. P.