No, you need to have a modded DSDT, it just needs to be done right. If you're new to this stuff, I'd say use airwwalk's extra folder with his DSDT in it, but delete SleepEnabler. I think SleepEnabler was causing your original issue, and not having a DSDT the second one. Then if you find out your bios version, if it's sz2z you can also delete NullCPUPM and OpenHaltRestart and you should still be able to boot.