Simplify the following text for a Grade 6 native English-speaking person.
Original: In this case , copies of the other system 's boot programs have been saved by GRUB ; instead of a kernel , the other system is loaded as though it had been started from the MBR .
Simplified: In this case , copies of the other system 's boot programs have been saved by GRUB . Instead of a kernel , the other system is loaded as though it had been started from the MBR .