Hi AyKay, what the users in the chat are trying to explain is that you are
not looking for a file called "yourrom.rom", there is no such thing. Rather,
it seems that "yourrom.rom" is a description of a thing you need to know the
name of.
This is like if I told you to run a command that addressed /dev/sdx. You will
not find sdx in the /dev folder, it does not exist. Rather, /dev/sdx is a way
of telling you where in the command to put in the address of the drive or
partition you want to be the target of that command. Does this make things
clearer?
Sadly, I have not yet librebooted my laptop, so I can't advise you in any
more details on how to find out what you need to put in place of
"yourrom.rom" in that command. Others here can probably help?