Very interesting article!
http://www.codeproject.com/KB/winsdk/CodeInject.aspx?msg=2470205#xx2470205xx

much easier to inject a compiled application if you make it a dll and just add it to the target's import table.

Or just calling LoadLibrary (via CreateRemoteThread if working remotely) on the exe itself. In the absence of a relocation table, the resulting image (which obviously won't be loaded at 0x00400000) will have dangling references but these can usually be fixed easy enough with some static analysis.

I guess this article is a fairly educational journey through some important topics, but practically, disavowed is right - compile as a DLL for the win.