Hibernate option on vista

If you ever loose option to go hibernate on vista, here is what I found on some ones blog, sorry I forgot the blog address:

To enable hibernation in Vista bring up the Command Prompt by click on "Start Button" then in the "Start Search" field type CMD and press enter. (This should be as administrator and to do that right click on CMD and opt for run as administrator)

In the Command prompt type: POWERCFG -H ON

This will enable the hibernate option