Change the home, end, page up, and page down key bindings in macosx

DefaultKeyBinding.dict

{
        /* home */
        "\UF729"  = "moveToBeginningOfLine:";
        "$\UF729" = "moveToBeginningOfLineAndModifySelection:";
                
        /* end */
        "\UF72B"  = "moveToEndOfLine:";
        "$\UF72B" = "moveToEndOfLineAndModifySelection:";
                            
        /* page up/down */
        "\UF72C"  = "pageUp:";
        "\UF72D"  = "pageDown:";
}