For a keyboard flier

My parents will never get me a joystick or Y&P before mastering the keyboard first, my parents know I don't always get the centerline, especially true in challenging approaches like TNCM and VHHX RWY13. For my parents, it means being able to shoot a checkerboard approach (VHHX RWY13) on keyboard and touch down on the runway centerline with enough runway to get myself to 10-20 kts by hold short point of RWY31, with a 747-400 (since that's the largest thing that landed in Kai Tak).
I know these two are hard to perform even with the best joystick and the best operator. Last time I landed in Kai Tak through the checkerboard, I touched down B-KPA (a 773ER) on the runway with enough runway to stop but halfway between the centerline and the runway edge. This is proof that my mastery of the keyboard is far from anything reasonable.
How should I use the keyboard better to increase my chances to get the centerline of the runway and enough runway to get myself to 10-20 kts by hold short point of RWY31? All I used in my last try was the arrow and F1-F4 buttons.
I know these two are hard to perform even with the best joystick and the best operator. Last time I landed in Kai Tak through the checkerboard, I touched down B-KPA (a 773ER) on the runway with enough runway to stop but halfway between the centerline and the runway edge. This is proof that my mastery of the keyboard is far from anything reasonable.
How should I use the keyboard better to increase my chances to get the centerline of the runway and enough runway to get myself to 10-20 kts by hold short point of RWY31? All I used in my last try was the arrow and F1-F4 buttons.