If you wish, in your public_html directory you can enter
cp -R /u/public_html/nelson/public_html/104 104
All the hyperlinks among these documents are relative links,
so they would not need to be changed.
The two files requiring updating are
index.html
outline.pdf
and the plain TeX file corresponding to the latter is
104tex/outline.tex
You can modify it and then enter
pdftex outline
mv outline.pdf ..