dual booting

i dont know if its already asked here but..i do need some tutorials on how to do a dual booting on my system. thanks a lot.

http://www.antionline.com/showthread...hreadid=264681

http://www.antionline.com/showthread...hreadid=260811

any other tutorial doing a windows 2000 pro as a primary OS and, say, mandrake or debian as a secondary? thanks for the great help. :)