Here's more complete way to get rid of this hidden feature of Office 2003: from command line, run this:
Code:
msiexec /i {90110409-6000-11D3-8CFE-0150048383C9} REMOVE=Excel_WISPFiles,Word_WISPFiles,PPTNonBootFiles,WISPFiles,XDOCSNonBootFiles,WISPHidden
(verify product code with your installation, it may be different for different Office products).