It depends on how complex an installer you want.

Does it need to check for the Framework first that kind of thing? Will it
need an Uninstall? if not then it should be relatively straight forward. It
gets hard when you have to deal with DLL's and system files.

If you don't need to do any of that sort of thing, then take a look in this
directory of your machine "C:\Inetpub\AdminScripts" Pay attention to the
mkwebdir.vbs file.

This will get you started setting up a Website using scripts and you should
be able to copy any files you want to the directory using standard file IO
methods.

ink