I Googled, XP How to add hibernate to the Shutdown options and found a number of links.
The first one I tried was this;
but I am not at all sure the information there is that useful.
I also found Microsoft guidance here, http://support.microsoft.com/default.aspx?scid=kb;en-us;893056 , but their guidance is to apply a "Hotfix", and then amend XP's registry. However, the hotfix file is not available for download and Microsoft says that you must contact them for it.
So, this doesn't seem too easy, but you may have better luck with your own research.
i have 2 laptops both running WinXP-SP3. In one lappy, when i click on the 'turn Off Computer" under the start option, I get 4 options to "Hibernate, Standby, turn Off, restart" however under the second lappy, there are only 3 options, which excludes the hibernate option.
I realize I can press shift to flip between Standby/Hibernate, but would rather have a permanent button for it. Appreciate help on how to do this.