wiping

From my understanding, if I upload a different kal it will over write the current one in the ECU right? or its something I have to do in K manager to wipe the current .kal...

I wanted to see what some of the Mac pros in here would recommend for completely wiping a mac hard drive. Pretend I'm a business that has financial data about customers. I don't want to destroy the drive..but I want to completely wipe it. What would you recommend? If it matters this would be...

exaxtly as the title says... i park in a basement and its dust infested. just wondering if you use a microfiber cloth and wipe the dust off.... will it leave swirl marks or scratches of any kind? if it does... how do i take take off the dust without scratching the car? thanks guys! :spin:

I've read that once you wash a black rsx, you should use a 100% cotton towel to wipe the car down in order to prevent those swirl/scratch marks from showing up. My question is, what about those rubbery towels (dunno their offical name) that some ppl use instead of the cotton towel.. are they...