currently i live in South Africa and i have a south african account but my mw3 game is from The States , so in order to get the new 2 maps erosion and ground ( i don't know how to access the face off mode ) i did create an american account then i found the Add on of the 2 maps and i did install them , i'm wondering will they be available in the south african account ?

if so how can i play on this face off mode ?
if not can i download them on flash drive and then install them manually ?