Possible Duplicate:
Remove Mac OS X and install Windows?
Can I erase OS X after I installed Windows with Boot Camp?
On my iMac I have installed Windows 7 via bootcamp. After some time I have decided I will stay with Windows and now need more disk space (most of space is prereserved for Macintosh HD). What is the correct way for me to wipe OS X drive and transfer all the space that will get freed-up to Windows?