Rated 5 out of 5 stars

Because I can't reply on your post or write you a message (?!) I am posting again. Thank you so much for your fast reply! Standby is where the PC is turned on very quickly again, everything is saved in the RAM. I'm using it all the time. My Windows is in German. The other option is where everything is saved on the HD and then Windows is shutting down. Is that Hibernating? Or how is it called?
From the article you gave me it sounds like Only one of the two is possible. How can I then select at Windows this or that one? Or is it then just deactivating the other one?
So, if I want to use your tool to get into Standby, I just need to deactivate Hibernation first, correct? Thank you, Greetings from South Africa!

This review is for a previous version of the add-on (0.9.1-signed). 

Suspend: Suspend to RAM
Hibernate: Suspend to disk

You can set "suspend" or "hibernate" as an system-wide default as described in the KB.

But there are third-party tools that can "suspend" and "hibernate" the computer from cli without the need to mess around with windows settings. For example:
http://technet.microsoft.com/en-us/sysinternals/bb897541

Rated 4 out of 5 stars

Thank you for this great tool!
Can you please seperate the entries hibernate and standbye? Or let me know the executeables and arguments for it? Thank you!

This review is for a previous version of the add-on (0.9.1-signed). 

That's not possible without third-party utilities.
You can switch between suspend/hibernate as described here:
http://support.microsoft.com/kb/555569/en-us