how do i install windows xp on another hard disk connected to my pc?

Answer 1

well if you want to install the window XP from other hard disk is also impossible.But after install just your computer can use or other pc smae like you can use only if different then sorry it can't if one of driver or hardware different is can't to start the pc when cache in the person are want to use.

Answer 2

you cant, it would need all the hardware to run... your memory,graphics card, mouse, keyboard and etc...