Can I install MS SBS 2003 twice on same pc

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From: Lawman (anonymous_at_discussions.microsoft.com)
Date: 04/02/04 

Date: Fri, 2 Apr 2004 07:10:49 -0800

I want to first experiement on one of our old pc's that
we have by putting small busines server 2003 which I just
bought. Is it possible to insatll it on this old box and
later when I am comfortable with the whole setup I can
install it on our current good box with the small SBS
2003?

tHANKS.