Here is the link to download the definition updates for Norton Internet Security 2009.
Download and save the file, burn it off to a CD-R or USB thumb drive, then insert it in your friend's computer and run the saved file to update the defintion files.
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If you already have Norton Internet Security 2009 installed in your computer and have used the product code/serial number to activate it in your computer, I don't expect it'll work in your friend's computer, unless you have a multi-user license.
If he's not going to have an internet connection and go on-line, there's no real need to install the program.
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