Dual boots easy to set up:

A few ways of doing it:

If i was you, i would install XP on the new disc, then from within XP i'd use partition magic to split the disc how you want, and then install vista on the other partition

Or you can set up the partitions using the XP / or vista set up,

But i found it easier to install XP 1st.


Why do you wana do it though?

Do you actually need XP?