Look at the top of the thread - You should have these regions already.
Go into the game and select QM, then check the available regions and if you have the Falklands and North Sea
that will indicate that you have all the other regions as well.
They were not included in the original first release of DW and SCS made them available subsequently.
In the very unlikely event that you are running 'the original', you can download the SCS Region pack from:
http://www.subguru.com/downloads.html