Hi,
You have probably solved this already. But just in case.
7941 / 61's can have both abbr dials and speed dials. The speed dials on these phones are associated to the line buttons on the phone. i.e. 1 speed dial on a 41 and 5 on a 61.
However, you need to change the phone button template so that the buttons are set to speed dial instead of lines.
Then they should be available to set as speed dials.
Cheers,
Tim.