Well, I decided to add this section after some getting some responses from the Optimizing Your DOS Memory Page . How you'll chose to boot your system is up to you. Remember, before you begin, it is always a good idea to make backups of those files.
First number is for the display font, second is for the background.
In this case it is 7 for white, and 0 for black. RAM tells emm386 to handle all my RAM memory. It allows the driver for the mouse to be loaded in the extended memory leaving only a 1k signature in your base memory. It's just the syntax. Other options are available such as time, date, etc.