No white space when clicking enter

Ok I downloaded a script that includes as part of the php script FCK editer bundled.
I am finding it very anoying and dont like it at the moment at all.
How do I get the stupid thing so when people type in it and hit enter for a new line it dont leave a white space. just want it to work like a proper typing thing that when you hit enter on the keyboard you get moved to the line directly bellow the text you alredy typed. make it use a div as standered instead of a chuffing <br> or <p>.

Please what files do I alter to do this