How do imake a new MBR?

[Krister Ekstrom]

Hi everyone. I'm planning on removing my Linux system at least for now. 
I have a dual boot machine with Windows XP Pro and Linux on separate 
hard drives. Grub is in the MBR, so i guess i'll have to make a new MBR 
before i can remove the hard disk with Linux on it, the question is how 
do i make a new MBR and do i have to re-install windblows in order for 
this to take effect?
Thanks for any & all answers.
-- 
/Krister