How do I change the ACPI mode in Bios?

I have changed the system ACPI mode with terminal and put it to 3 and with a quick try that I made last night it went to sleep and then it woke up, but I didn't had keyboard or mouse. So I don't know if it was fully funtional.

Also I am using the plain TOH 9.2.0 kenrel that comes with Zephyroth 10.5.2 Rev.2 iso, I have tryied to change with the sleep kernel from Kaliway but I can't boot into my system, so I have returned to the old kernel.