maven release with multi module project and main pom in sub-directory

Question

I'm working on a project, which originally was set up by a different author. Each module has its own directory. Also the main pom (my-project-pom), which includes the modules, is stored in a separate sub-directory. We're using subversion:

+-- branches
+-- tags
'-- trunk
     +-- my-project-pom
     +-- my-project-web
     +-- my-project-ear
     '-- README

Now I'm trying to setup the maven release plugin with following goals:

• Everything is included in the commit from maven release, also changes in the root README file
• SVN tags are automatically created in the proper repository directory tags\<version>

So my questions are:

• Is this possible at all, although the main pom is not in the root directory?
• How should I configure the <connection> and <developerConnection> URLs in my-project-pom to achieve this? Do I have to point directly to the trunk or to trunk\my-project-pom or something different
• Is there any other configuration required besides the <scm> configuration above and the definition of the plugin dependency - e.g. the tagBase setting?
• In which directory do I have to execute the mvn release commands?