In my opinion, I think it's best to change the 6EB0 to your new lba, but leave the 5EB0 alone. This way when you select to return to the game from within the browser, it will go back to the DC system menu. If you change 5EB0, it will just freeze the browser and you'll have to reset your DC.
I always prefer to leave the games at 45000 lba if possible anyway, which avoids this problem altogether, but when a game is just too big, I'd rather it go back to the system menu where I can just press start rather than having to reset my DC.
-Ex