Opening a complex project structure with Maven modules

Hi!

I want to work on projects where a repository contains a number of Maven modules in subdirectories. These modules are basically separate projects with their own src directories etc, that are grouped into one repository, in subdirectories. Is there really no way to open the entire directory structure in IntelliJ IDEA? If I open as project the root directory, the different source and resource directories in the different projects are not recognized as such. All I've seen anywhere is to import the different projects separately as modules. But this is not at all convenient. It's quite tedious to do on a large number of projects and I then can't see the whole directory structure at a glance...