Hi jokop
Well done with the upgrade, but like I keep telling you, I don't think the bootloader is responsible for your sleep or screensaver issues. And after a couple of requests, you still haven't told me what hardware or what OS X installation you are using so I can't help you any further. It seems to me like you really want to follow the Zikman's two year old post, so go ahead and try it.
I have to be honest here and I hope you understand that I am not being unreasonable here, but this forum is dedicated to Chameleon and as it stands, the bootloader is working fine for you. And we have succeeded here in your original question of should you install Chameleon and got you up to the latest version.
The issues you have are with your own hardware and your OS X installation and I don't think it's anything we can fix in these forums. All I suggest is you try InsanelyMac, InfiniteMac or one of the other OS X related forums for further help.
Regards