Safe Sleep mode for most Macs

The new Safe Sleep function has been thoroughly explained on Hardmac. It allows the RAM content of the latest Powerbooks to be saved in case of power shortage. Good news: thanks to a hack found on http://matt.ucc.asn.au/apple/machibernate.html , this function can also be set to work on most Macs running OS X 10.4.3 (server excluded). Here's how you should proceed... of course at your own risks! Launch the terminal and run each of the following commands sequentially:

sudo nvram nvramrc='" /" select-dev" msh" encode-string " has-safe-sleep" property unselect'
sudo nvram "use-nvramrc?"=true

Reboot. In order to activate the function, you may then run the following command:

sudo pmset -a hibernatemode 3

If you want the safe sleep mode to become the default setting, replace the 3 by a 1. If you want to deactivate it, set this argument to "0" instead.
If you want to undo the previous commands, just run this one:

sudo nvram "use-nvramrc?"=false

Please let us know how it worked for you.