Try "Tedd's Droid Tools" for the "push button" variation or the slider.

BT - stage it before you use it. Once the BT connection is made it automatically "calls", "dials", "finds", etc depending on the first command word it recognizes. I do find that the BT is not completely reliable as to who it calls. Experiment, enunciate clearly and do not have any background noise (radio, window down, etc) while trying to use the BT. it is completely hands-free once the connection to an earpiece or car are made.