Hi,
I found this method myself through experiments with stuff in my phone.
Here's what you do. (This only works for SymbianOS Games. Sorry Java game players)

Install MagicKey 1.0 from searching the forum or i hav attached it here


Install your Non-Ngage (SymbianOS) game.

Here's how to do it!

1. Open MagicKey and press 'right' to go to Keymap List

2. Press options>add

3. Enter the name of your game as the keymap name

4. Highlight your new keymap and press options>edit

5. Click to add key pair

6. For key 'A' (circle), enter '228' without the quotes as 'Original Key'
Then go to 'Maps to' and choose the key you want to assign it with

7. Press 'OK'

8. Once again, Click to add key pair

9. For key 'B' (square), enter '229' without the quotes as 'Original Key'
Then go to 'Maps to' and choose the key you want to assign it with

10. Press 'OK'

11. Now press 'Back' and then press left to go to 'App List'

12. Press options>add

13. Find your game and select it

14. Now highlight your game in 'App List' and press options>choose map

15. Select your game's key map

16. Now EXIT MagicKey (you should not leave it running in the background)

17. Now open your game and Enjoy using your gaming keys on Non-ngage games!

Example.
For assassin's creed HD,
When you click to create a key pair, you can do this:

Original Key: 228
Maps to: 167 (This key is called 'OK'. It's the key you use most in your phone)

Now open assassin's creed HD, go to options, orientation>rotate right.

Now you can use gaming key 'A' for jumping in the game!

NOTES!

* The gaming keys will not light. They only light in Ngage games.
* I suggest you to use MagicKey in games have only 1 or 2 main game keys. Assassin's Creed HD uses almost all number keys. The above was just an example.

VBAGX!

You don't need MagicKey for vBagx. All you have to do is open your GBA rom in vbagx, press right selection key>keys
Then select "A" and when it asks you to press any key, press your Gaming Key A(circle)
Do the same thing with "B" for gaming key B (square)
vBagX is one of the few games that accept using these keys for gaming.

vBagX is probably the best game emulator to use gaming keys because in GBA, you only have 'A' and 'B' anyway.

'L' and 'R' are not used for most games. I suggest you assign L to '*' and R to '0' (within vBagX only) because when you're playing GBA in landscape mode, if you need these keys, you only have to open your slide a little and when you're done, you can close it again.

ENJOY YOUR LANDSCAPE TRULY-N-GAGE-LIKE NON-NGAGE GAMING!
Using N81's Gaming Keys (A and B) for Non-ngage games!