Marlon & Chandana,
Sorry if I wasn't clear in my post.
Marlon, I would not recommend copying the Master.mdf file from another server. This will be a disaster.
I would copy your databases (not the system databases) to another directory and after the reinstall, copy them back to the desired data directory and reattach them.
Again, setting up a maintenance plan to back up your system and user databases is the best plan.