[support] show submenu in block when parentmenu is clicked

Hi, I'm trying to achieve something that seems simple, but is really killing me :( This is Drupal 6.1 I have some primary links. When I click one of these links I would like a submenu to appear in a block elsewhere on the page - that's really all (for now). I just can't get it working - I've looked through every module and a lot of functions in the d6 api, but no luck so far. and deadline is closing in - yikes! cheers Morten