Windows Start Up and Log Off Sounds

Hello,

I have been trying to do some customizations to a theme i made on my computer and I have been fiddling around with the sound settings. Essentially i wanted to change the windows start up, log off, and shut down sounds that play when i perform those functions to audio clips i personally made for my enjoyment.

The shutdown sound works fine, but i cannot seem to get the start up and log off sounds to play at all. When i change it in the sounds menu they just never play. I saw online that one way would be to swap the old sound file for the new one and give them the same name, but i am restricted from modifying the originals in any way, shape or form. As well, i saw another method that involved messing around with the imageres.dll file and using a hacking program, but i am unable to complete the finishing touches because this is a laptop i am using and it has a broken screen (currently i have it plugged into a monitor), and thus it leaves me unable to access the system recover options screen on startup.

Is there any other way to change these sound settings or am i just screwed?