FirstSource,
The easiest thing to do is just to create a Station Speed Dial [Default FC: 383] and pick a BIN [0-9].
Program the BIN # with the phone number you want to use, but make sure you start it with the Outgoing Feature Code [Default FC: 8].
Next, select a User Programmable Key or Manually Program a button [Default FC: 397] and assign a Station Speed Dial [Default FC: 382] followed by the BIN # you programmed with the number.
To test it press the number and it should call out without needing to dial Outgoing or 8 prior to pressing it. Then try it with your Forward button and see if that works for you.
Thanks,
TE