what i normally do is simply go into IIS and 'stop' the service. then run wamp.
so there really isn't any editing needed.
then when i need to go back and use IIS (asn.net / mssql) stuff, i stop wamp and start iis.
that way they don't ever fight over port 80. iis is a notorious hog on that port, because it listens on all IPs by default vs just localhost or a specific IP.
you'd have to do the same for any other web server who wants to run on the standard port 80 too.
so it's really whether or not you need both at the same time. in my case they are mutually exclusive as i switch back/forth between the asp.net world into the php world.
Good luck
ps: ah cool. glad i went over to the wampserver site. they have a new version with new apache2 and php an mysql out. w00t
