Edit 11 years later: I did not write this. Not sure the original source, but thanks to the original author.
While working on a utility project today, I stumbled upon wanting to embed an executable inside another executable. Sounds fun doesn’t it? And what is even more fun is to be able to launch the embedded exe!
Basically, here’s how it works. You embed Foo.exe inside Bar.exe. And by embed I mean, add Foo.exe as a resource in Bar.exe and then, from Bar.exe’s code, you can launch Foo.exe using CreateProcess().
So before answering the "Why?" lets answer the "How?"