Hi Richie,
MS Office Publisher 2000 would not be removed if your
edition of Office 2003 did not have its replacement
but the Small Business Tools, which are, in some cases
3rd party tools that were bundled with Office may or may
not be problematic depending on whether those tools check
specifically for a particular version of Word or other Office
app being installed when they run as an add-in from within
the app.
========
Will this installation, replacing Office 2000 Small Business Edition, wipe
out present features such as Small Business Solutions and Publisher? Thank
you. >>
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Let us know if this helped you,
Bob Buckland ?

MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*
Office 2003 Editions explained
http://www.microsoft.com/uk/office/editions.mspx