what i dd is pretty simple, Since the major issue is about the region but u can have guys from U.S.A currently in Zimbabwe accessing marketplace for as long as they don change their account details. here is how i went about my situation:
1) I created my windows live account and set my country as U.S.A, state Louisiana, city Albany, zip code 70711.
2) On my phone, under settings> region+ language, i set that to utc +0 which is the time zone for albany but i still left my location services on and time auto update so i could still get correct time.
3) The next step is to add yo windows live i. d. which is a primary requirement if you are to ever access marketplace and other windows services. Normally you go to settings>emails and accounts then you add your account, i have included another way to add your live account in my other blog post incase this one fails.
With all this done, nomatter where you stay, marketplace restrictions or any regional conflicts, marketplace is all yours to conquer.