Hi James,
It's easy, just configure your aolserver to listen, for example, on 127.0.0.1:80, and have a look at the apache mod_proxy documentation to redirect the requests you want to aolserver. Typical apache config could be something like this:
##### Proxy
ProxyRequests off
<proxy>
Order deny,allow
Allow from all
</proxy>
ProxyPreserveHost On
ProxyPass /whatever http://127.0.0.1/whatever
ProxyPassReverse /whatever http://127.0.0.1/whatever
...
Have a look at google, there are lots of examples about that.
Cheers, Héctor