I am using Windows XP SP3 (32-bits) - 4GB ram with PAE
I am not sure why I can "Tick" the "Enable OS Invisible Physical Memory" but the "Change IM Settings" is disabled.
It seems that I have no way to change the "Support IM Hibernation" option to YES.
I can use IM for my Ramdisk now. However, without IM Hibernation, it can be painful.