Office 2000 Small Business on computer running XP

[skyangel]

I have a 2 part question.

I have a new HP computer which is running Windows XP. It came with a trial
version of Office 2003 which has recently expired.

I'm currently running Office 2000 Small Business on my computer at my
business.
I see no need to have to purchase additional software at this time. The
Office 2000 CD's jewel case does not have the registration codes on it.

1) How can I find the registration codes for the Office 2000 version I am
running on my office computer? Surely, they are located in a file on that
system somewhere? How do I go about finding them?

2) How do I get Office 2000 to run on my home computer running Windows XP?
I am getting a message that says XP does not accept MS DOS? Could you
point
me to the appropriate downloads etc?

Thanks, Skyangel