rbw,
it should be one step more:
1) DEVICE
2) P** (hold until 2 blinks)
3) 994 (light blinks twice)
4) P* (light blinks once)!
5) 3-digit code
6) Key you are assigning to

Additional all 3-digit codes are transfered to range 000 - 255, for example:
357 = 101 + 256 (the same function like 101)
613 = 101 + 2*256 (the same function like 101)

Kazik.