How 2 copy my xp o/s and use it on my laptop

I wanna make a copy of my window xp program operating system and use it on my other computer that has win 2000.
i have my key code for my xp,but when i bought the puter…the o/s was in it.
i have a cd burner on the 2000 puter…
not the xp.
i have 128mb fat discs,thumbs,no floppy. Theyre both laptops and i also have the cable to transfer from one puter to the other.
any help would be hot!

You cannot use your copy of Windows XP on two computers. Windows XP must be activated, and the serial/CD key is locked to the hardware of the first computer that is activated.