Installing a new package
A LATEX package usually consists of a .ins file, plus one or
more .dtx files, and possibly some .fdd files.
To install a package so that can use it,
run LATEX on the .ins file.
This should create one or more files with extensions of the form
.sty, .cfg or .fd. Move these files into
a folder where TEX can find them; a good idea is to put them
in a new subfolder in TeX-inputs.
If you want to read detailed documentation about the package then
use LATEX to process the .dtx file and create a .dvi file.
After using the package and verifying that everything works, you can
safely delete the .ins/.dtx/.fdd files.