Misty, opening it up and removing modules that are considered by Irobot to be "user serviceable" is not going to void the warranty.
That's why they made it modular. They intend for you to be able to remove and replace a module in the future if they send you one for something defective.
All it takes is two different size Phillips screwdrivers (the cross end type) to take the thing apart and you will find you need to do this periodically to keep it clean and running right.
Videos are on Irobot's website as to which modules they want you to mess with and we have a cleaning step by step here:
Oh, yes, and being a woman has nothing to do with it.
Nancy - Mom to 3 Furbabies - Bentley, Chelsea, Whiskey & 3 Roombas - 535 (Half Trax) and 560 (Shadow) and Dirt Dog (Old Yellow)