to mike in japan
I haven't heard about truly one-click solution. In all cases you have to do some action by your hands. If you want something smart, you could install any usual simulation program, and then add to context menu in explorer extra action, eg "Mount ISO-file as a virtual drive". But it isn't trivial solution and you better forget about it and just use Daemon tool or anything else in standard way.
to Anon
Maybe file is demaged. Try to open it in explorer and see what it tell you. Secondly, check if your Daemon Tools works correctly, try to make your test ISO-file.