two bootcamp questions

hey guys,

first -- how do i download the version of bootcamp that allows me to install windows 7? my unibody macbook came with bootcamp 3.0.

second -- right now i have winxp home installed via bootcamp. one program that i primarily use in windows, requires that i frequently press the "delete" key. on the mac keyboard, this is actually the "backspace" key. is there any way to have this key act as "delete" rather than "backspace"?

thanks!