Can same NIS 2012 cd be installed in one computer in United States and other computer in Mexico?

I live in Mexico but spend a couple of months in Michigan each year.  I have a laptop in Mexico and have NIS 2012 installed in the Spanish edition for 1 license which will run out in Feb. 2013.  I just bought a new computer for home in Michigan and need to purchase NIS 2012 for it.  If  I buy a NIS 2012 (English version) from Amazon.com  CD with permission for 1 user and 3 computers can I install it in the computer in Michigan now and in Feb. 2013 install it in the computer in Mexico.   Should I use my Latin American Norton account to register new English version or set up a new U. S. account?