I was informed that I could get demographic data for past years by buying past versions of MP (2002, 2004).

Do I need to install the program that comes with these versions, or can I keep my MP 2006 and just use the data from these versions?

If I get MP 2002, for example, can i be certain that the demographic data is actually from 2002, or could it simply be the latest data Microsoft has?

Gary