Hi, stanby not have the same function of hibernate...
If you want hibernate while still in Mala not is possible use the Shutdown options present in MaLa (section GUI - Mala Exit) because the button hibernate not is present :'(
The only way that i find for hibernate while still in Mala is:
Enable the hibernation on windows xp:

Now create two file:
1) Shortcuts for hibernate:
a) Right Click on your Desktop, go to New>>shortcut.
b) Copy the commands: rundll32.exe PowrProf.dll, SetSuspendState
c) Click next, rename the file hibernate and then finish
2) Create txt file in the same directory where is the shortcuts, write START C:\hibernate.lnk (if your shortcuts is on c:/), save and rename the file hibernate.bat (change the extension file)
Now go to mala option - controller - external application, set the directory where is the file hibernate.bat file, choose one key and remap it with pushbutton on your cabinet
When you want quit and go to hibernation while running Mala push the buttons

(the better solution is use shift key for use it...)
Exist other way more easy for do it?
In the next relase of mala is possible add the hibernate function on dropmenu?

Thanks!
p.s. other way for use hibernation is here:
http://www.mygeekpal.com/542/how-to-enable-hibernate-feature-in-windows-xp/but this way not is possible use while running Mala