Bug 147727 UI incorrectly prevents overlapping project locations on disk
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/WizardNewProjectNameAndLocationPage.java
private String getProjectLocationFieldValue() {
        if (locationPathField == null) {
			return IDEResourceInfoUtils.EMPTY_STRING;
		} 
       return locationPathField.getText().trim();
    }
    /**
     *	Open an appropriate directory browser
     */
    private void handleLocationBrowseButtonPressed() {
        DirectoryDialog dialog = new DirectoryDialog(locationPathField
                .getShell());
        dialog.setMessage(IDEWorkbenchMessages.WizardNewProjectCreationPage_directoryLabel);
        String dirName = getProjectLocationFieldValue();
        if (dirName.length() > 0) { 
            if (IDEResourceInfoUtils.exists(dirName)) {
				dialog.setFilterPath(new Path(dirName).toOSString());
			}
        }
        String selectedDirectory = dialog.open();
        if (selectedDirectory != null) {
            customLocationFieldValue = selectedDirectory;
            locationPathField.setText(customLocationFieldValue);
        }
    }
    /**
     * Returns whether the currently specified project
     * content directory points to an exising project
     */
    private boolean isExistingProjectLocation() {