How to save game data before formatting

Sorry of ultimate noob query guys, but not in gaming much thus asking it.

I am about to shift on windows 8.. Would be making a fresh install.

Thus like to know how to save the game data, So that after reinstalling them I could begin from where I ended.
To be specific - only two games data needed to be backed up - Virtua Tennis 4 and NFS Hot pursuit

Thanxx
 
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