emacs install and loading libraries

I am installing emacs-19.34 on my system. The installation guide says:

5) Put into `./lisp/site-init.el' or `./lisp/site-load.el' any Emacs Lisp code you want Emacs to load before it is dumped out.  
Use site-load.el for additional libraries if you arrange for their documentation strings to be in the etc/DOC file. 

Would it help to include  emacspeak code or w3 code or libraries in
 these files?
John Morgan