A key component to all of this is not just to reformat the drive, but to WIPE it. Norton SystemWorks has a great "wipe" feature. After reformatting and reloading your drive, make certain to run Norton Wipe on it to destroy and scramble up old data. You can also use wipe periodically when things are going well. People think that, by trashing documents, they're deleted. They're not. They are just told by the operating system that they are available to be overwritten when the space is needed.
Qball made excellent suggestions. Nice work, man.
I hope everything works out!!!