Create a system speed dial for each one that used the "direct trunk select" feature code.
Speed dial '81' actual number <feature code>+<Co trunk number 1>
Speed dial '82' actual number <feature code>+<Co trunk number 2>
Speed dial '83' actual number <feature code>+<Co trunk number 3>
Speed dial '84' actual number <feature code>+<Co trunk number 4>
Ralph