As LaTeX works on so many machines, I can't really give you
detailed informations. So I assume you know a little about it. You
should copy the files EgypUtil.sty egypto.sty
hierLtx.sty hiero.sty, and OT1diacr.fd where they
belong. You might need to rename OT1diacr to
[3]
T1diacr.fd. If you are using a Unix system, these files should be on
your TEXINPUTS path. The directory where your own LaTeX
sources are should do in most cases, anyway.
Then, put your fonts where they can be used. On Unix systems, you will
need to put the .tfm files in one of the directories listed in
the TEXFONTS environment variable, and the pk files in
one of the directories listed in you PKFONTS environment variable. Or
TEXPKS. Or something else. It depends on your printing program.
If you need another base resolution than 300dpi, you should get the
metafont sources (HieroFonts) of the fonts and then make a 1.2, 1,
, 
magnificated version of each hieroglyphic font
(A-Z and Aa.mf); you should also build the diacritic fonts
diacr7,8,9,10 and 12, and a magstep 0 version of the Egyp font (parts
of cartouche and others). To do this you need to have the metafont
program installed. Actually, if you have the GNU font utilities, I
distribute all files needed to redraw the fonts.
Then you should go to the SeshNesout directory and build the sesh program (read the README file). It is a text to latex converter, with a `` manuel de codage''-like syntax.