local dev environment - changing wwwroot determined by port

[eluser]drewbee[/eluser]
Hello All,

I have multiple projects, each of which exist at the root on my local machine but exist on completely separate entities out in the web.

Also, I am running WAMP but all of this should be taken care of by the apache config directive.

I want to setup a type of routing with the http.config but not sure if it is possible. Let's say I have the following structure

wwwroot/Project1
wwwroot/Project2
wwwroot/Porject3

What I need to happen, lets say based on the port given to change the webroot directive to actually be at the given project

so http://localhost (default, point to www/Project1)
http://localhost:81 (point to wwwroot/Project2)
http://localhost:82 (point to wwwroot/Project3)

so on and so forth. Is this possible to do? Maybe with htaccess? Searching has led me no results anywhere.

If anyone else has some suggestions on this one, please let me know.

I am not looking to redirect or anything like that, as I want the subfolder to truly be the 'document root' of the current instance.

Right now I actually go into the apache httpd.config and edit the webroot value, and restart the server.

Edit again. Maybe I can use virtual hosts to toggle between the different roots. I just happened to stumble across this document:
http://httpd.apache.org/docs/1.3/vhosts/examples.html