Forum OpenACS Development: How to configure DocBook to convert xml to html

I am trying to follow along with the tutorial(creating a new package called notes) but I encountered a problem. I was told to edit the "index.xml" file. I was supposed to run the make command but I get some errors. I did some reearch and I realized that I need doc-xsl or xsl-stylesheets folder which I have installed. I tried to run make again and this is the error I received

cp -u *.png ..
cd .. ; /usr/bin/xsltproc ../../../acs-core-docs/www/xml/openacs.xsl xml/index.xml
xmlNanoHTTPConnectAttempt: Connect attempt timed out.xmlNanoHTTPConnectAttempt: Connect attempt timed out.xml/index.xml:3: warning: failed to load external
entity "http://www.oasis-open.org/docbook/xml/4.0/docbookx.dtd"
              "http://www.oasis-open.org/docbook/xml/4.0/docbookx.dtd">
                                                                      ^
Writing requirements-introduction.html for sect1(requirements-introduction)
Writing requirements-overview.html for sect1(requirements-overview)
Error Undefined namespace prefix
xmlXPathCompiledEval: evaluation failed
make: *** [html] Error 10

I also need to download Docbook XML DTD and get xsltproc. How do I go about handling all that? How do I configure my DocBook to convert xml to html.

Thank you James

Thank you for your reply.  Now the question I have is where do I find these softwares or programs, and do I install them?

Thank you

James

I am running Red Hat 8.0

service0=# select version();
                                                 version
---------------------------------------------------------------------------------------------------------
 PostgreSQL 7.2.4 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.2 20020903 (Red Hat Linux 8.0 3.2-7)
(1 row)

Thank you