You will be presented with information as above. If your system profiler reports your machine as ACPI.
Type in next to "Machine model"
Don't forget the semi-colon at the end otherwise system profiler will go screwy!
Try just this first, then as you get the hang of it, you can customise other parts in the same way.
Replace the modded text back into the same place you dragged it from, you will have to authenticate. You may have to send the original localizable.strings to the trash first
You must then repair permissions to your disc and if system profiler was open, close it then reopen it. You should see the information you want.