Thanks for the replay but for whatever reason it not working for me. I did as you asked and nothing. I even tried doing it the other way (clicked cursor up, then add, and then w on my keyboard).
Well, I had it the wrong way around in my instructions, so changing it around was correct on your part. My instructions were also incomplete. I only rarely use the keymapper, so I've forgot an important part. Here are the proper instruction (I also tested them again, just to make sure):
1. Click on Cursor Up, then click on Add, and then press the W on your keyboard
2. Click on Cursor Up, then click on Next until the Cursor Up binding appears, then click on Del
3. Click on the W, then click on Add, and then press Cursor Up on your keyboard
4. Click on the W, then click on Next until the W binding appears, then click on Del
5. Now click on Save
If you don't do step two, pressing W will register as both W and Cursor Up. Same for Cursor Up, if you don't do step 4. Moving the WASD keys to the Cursor keys is necessary, because you will need the A and S key at a later point in the game.