How do i save games
 

How do i keep the games that i have saved on NFS MW black edition so when i reinstall the game i can pick up where i left off?????

Most new games put their configuration files and saved games into the home directory of the current user. On the usual Windows installation, this is "C:\Documents and Settings\<username>\Application Data\<game name>" or similar.

C:\Documents and Settings\My Username\My Documents\NFS Most Wanted\Folders with the names you used in the game

Very close tho Joe ;)