Solution:
* Toggle to the Calendar view.
* Using the small navigational calendar in the top left corner, simply hold down the "CTRL" button, and using your mouse, highlight the range of dates that you want your view to be - in this example, start with the current day, and highlight the next 13 days to give you the 14 day view that you're looking for.
* You should now have a 14 day (2 week) view in your calendar.
* Now go to the VIEW > CHANGE VIEW menu options, and select "Select current view as a new view". When the dialogue box pops up, name it something like "2 Week View" - and you're done.
You should now find that whenever you toggle out calendar view, to your email or contacts or whatever, when you come back to the Calendar tab that it's still showing your new, custom 2 week view.