All the programs will be deleted while you installing different version in the same operating system. If you are unable to pay. There are many sites which may provide the microsoft office 2010.
So prefer those sites.
No way you want to unistall and then only you can .. but way is there if you do dual windows i.e. , keep both windows xp&7 use ms office in xp ...
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.