Installing Add-Ins 2007
To install an Add-In in Excel 2007 you need to click the Office button
and press the Excel Options button.
From the options dialog select the Add-In section. Select Excel-Add-ins
from the Manage drop list and then press the Go... button
From the Add-Ins dialog you can use the browse button to locate the add-in you wish to install.
To uninstall an add-in simply uncheck the appropriate add-in within the list.