If any of them have DS next to them, these can be downloaded directly from the Download station - just click View in Main List in the View Dependencies box, then select the items that are displaying the DS symbol (Hold Ctrl down if there is more than 1), then right click the first one and select Download - they will then appear in the Download Helper box, ready for downloading - all you will need to do is click Start.
If the items have a ? next to them, it may be worth posting them here (You can select items in the View Dependencies box in a similar way to described above) then right click - Copy. Paste the results into a new post.
Shane