Run two apache (httpd) servers on CentOS 6

I'm actually working on an old CentOS 6.5 server during my internship in a society that produces maps.

I worked last month on a CRM implementation that runs on an apache2 located in /usr/local/apache2/ and uses some ports.

My boss recently asked me to build a tiles server on the same machine, so I used a fresh apache2 installation to do it that runs in /etc/httpd (where it's normally suppose to be).

Now, I would like to run all my work at the same time.

In fact, if my old/primary apache2 is already started when I try to start the second one I get:

(98)Address already in use: make_sock: could not bind to address [::]:80

(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80

no listening sockets available, shutting down

Unable to open logs

That is quite normal I guess...

I would like to be able to get an access to my tiles with some ports on my second apache2, something like:

myserveradress:someport/osm_tiles/{z}/{x}/{y}.png

and be able to have an access to the ports 80, 8080 and some others on the first one...

Does someone have ideas ?