Changing Rated Thrust in 737-800?

Hi,I was wondering if there is a way to change the thrust for this plane, so that that FMS shows 27.3k instead of 26. On Boeing's site, they say generally that 737-800's have 27 or 27.3k lbs thrust. I was wondering if I can change this or not.Yes, I do realize that some airlines require and have different thrust settings for their planes :)Thanks for any help!