Unable to install mod_wsgi on CentOS 5.5 VPS

I am trying to install mod_wsgi on my VPS, but it won't work. This is what I am doing:

wget http://modwsgi.googlecode.com/files/mod_wsgi-2.5.tar.gz
tar xzvf mod_wsgi-2.5.tar.gz
cd mod_wsgi-2.5

./configure --with-python=/opt/python2.5/bin/python

After I run the above command, I get this error:

checking for apxs2... no
checking for apxs... no
checking Apache version... ./configure: line 1298: apxs: command not found
./configure: line 1298: apxs: command not found
./configure: line 1299: /: is a directory

./configure: line 1461: apxs: command not found
configure: creating ./config.status
config.status: creating Makefile
config.status: error: cannot find input file: Makefile.in

Through some research I've discovered that I need to modify my command:

./configure --with-apxs=/usr/local/apache/bin/apxs \
--with-python=/usr/local/bin/python

But, /usr/local/apache/ doesn't exist, or so that's what it is telling me. If it doesn't exist, how do I create it with all the files needed, or if apache is located elsewhere on my VPS where would it be located?

I'd also like to mention that I ran a command to install apache before this entire deal:

yum install httpd

so I assumed that was all I needed but apparently not (I am very new at all this server administration stuff so please be gentle)

EDIT: This is the tutorial that I have been using to get this all set up: http://binarysushi.com/blog/2009/aug/19/CentOS-5-3-python-2-5-virtualevn-mod-wsgi-and-mod-rpaf/

I got stuck at the heading "Installing mod_wsgi"

Thanks for any help!