please add "SEO" package group to the info file (package = SEO)
this is not entirely correct as per Drupal standards, but please think of the admins ;)
it's really annoying to have 50-100 modules in the "Other" fieldset/tab.
many modules follow similar approach (other administration, permission and caching/performance modules) to help admins
some SEO modules are using that package, while for others it has been suggested.