|All you're doing is swapping hardware from one case to another...why would you need to unistall any drivers?|
Just be very careful when you unassemble/reassemble. There should be no need to remove the CPU, CPU cooling fan or RAM from the motherboard...don't disturb them unless you absolutely have to. I don't know if either case has front USB, firewire, audio jacks, etc but pay very close attention to the case wiring...make a sketch if you have to. Hopefully you have the motherboard manual for reference & the new case came with a wiring diagram.