It would be nice to have a Visual Studio 2008/2010/2012 exporter option to disable the generation of the solution file. In almost all my projects, I add various static library projects (such as that for VFLib) to enable easier browsing. It would be nice if I could save the solution into the same directory as the project file, but that is not possible since IntroJucer overwrites a solution with the same name.
The folder that contains the project file is the introjucer’s property - I wouldn’t recommend putting anything in it that you don’t want to get deleted. Best to keep your own solution elsewhere, and just ignore the one that the introjucer creates if you don’t want to use it.