Providing an installer for asmx Webservices

Question

What is the best way to deploy a couple of asmx webservices to IIS. (6.0, 6.1, 7.0)
The services are an optional install and I think the most convenient way to install them would be some kind of Windows Installer package.
I created a small C# program that directly modifies the IIS Metabase, but this only works on IIS 6.0 and 6.1 and I don't want to ship something that might harm a customers IIS installation.

Our services (~10 different .asmx files) are all precompiled and organized in the following structure:

 /services
   /serviceA
      /bin
      Service.asmx
   /serviceB
      /bin
      Service.asmx
   /serviceC
      /bin
      Service.asmx
      ...
      ..
      .

Answer 1

I did this a long time back (XP) using VBScript and the VS installer?

Id imagine there is a much nicer way to do this now

Answer 2

WiX is really best tool to do any kind of software deployment on the Windows platform. Among other things, it includes custom actions for this kind IIS configuring, see XML elements <iis:WebServiceExtension>, <iis:WebSite>, <iis:WebVirtualDir> and <iis:WebApplication> for details.