I develop application in C# with MSVC 2010 Express, with Forms/WPF/etc.
Application consist of some private assemblies (maybe DLLs) and .exe file. It uses .NET 4 fea
Check out Inno : http://www.jrsoftware.org/isinfo.php It's free and pretty simple.
OTOH I've seen QTTabBar using it in its' codebase and it was literally one single text file (setup.iss). Let me see if I can find URL to their SourceForge page so you can see the source and the build ... There is it http://qttabbar.svn.sourceforge.net/viewvc/qttabbar/trunk/Install/ If you grab the source tree you can probably re-fit it for your app in a day.