USING WINDOWS 2000 AND XP AS A DUAL OS ON LAPTOP

HELLO! I HAVE A PANASONIC TOUGHBOOK WITH WINDOWS 2000 FOR THE OS. I RECENTLY GOT A STREAMLINED VERSION OF XP, AND WISH TO INSTALL IT AS A SECOND OS. MY LAPTOP HAS ONLY ONE HDD, i’M NOT SURE HOW TO MODIFY THE HDD SO I CAN HAVE A DUAL OS. HOW CON I DO THIS?

THANKS,

DDAYMEN