SP3 is refering to Office 2003 Service Pack 3. you can get it here:
http://www.microsoft.com/en-us/download/details.aspx?id=8
Activation is the process of proving to MS that you have a legal license to run their products (ie Windows and Office). Most of the time you can do an internet activation. If you don't have a good internet connection or are having problems you can do a phone
activation. Typically when you have a problem with internet activation you will be given the correct phone number to call. Otherwise you can use the links below to find the right phone number.
This link describes the activation process:
http://support.microsoft.com/kb/293151
Office 2002-2007
Here are some more links that should help:
**Contact a Microsoft Product Activation Center******Use this article to learn how to obtain the appropriate telephone number by running the Product Activation Wizard.
**Understanding Microsoft Product Activation******Learn how product activation works and when to activate a product.
(Win Vista, Win XP, Office 2007, 2003, 2002)
**Learn how to identify, locate, or replace a Product Key******Help with finding or replacing your Product Key required for Product Activation.
Phone Activation Process in Photos Win XP-7 Office 2003-2010
http://support.microsoft.com/kb/950929
NOTE: you can find links to the specific activation instruction for Office or Windows in hyperlinks at the bottom of the article
If the activation process fails, you can change the activation process to telephone and call the number it provides you. Do not enter anything until the phone system offers you the option to talk to a live service rep. Explain the problem
to them. You are transferring the installation from a “dead” computer, or you are getting an invalid product key and would like to know the exact reason
Manually invoke Activation applet to get phone number
· Click Start, or invoke Run dialog using <WIN
> +< R>
· in the Run Box type slui.exe 4
(you need to include the “4” to get to the right spot)
· Select the appropriate location for an activation centre near you and call them. Except on weekends.