I set my Sprint 2 flux ESC up with the castle creations "Castle Link USB Programming Kit". Search online for it!
No counting beeps or holding throttle. Just straight forward plug and play using the downloadable castle link software on the laptop and a mini usb cable. The adaptor has a mini usb plug on one end and a 3 wire servo plug for the ESC. DO NOT CONNECT THE ESC TO THE BATTERY WHILE CONNECTED TO YOUR COMPUTER OR THE ADAPTOR. Too much current will go through it and you will destroy the adaptor and possible damage your computer. I only say because it's unclear in the instructions and I was unsure. But the ESC powers up enough for the programming to occur when connected to the adaptor connected to a powered USB port. The software allows you to take away some safety features and get better performance out of the ESC/motor if using top quality batteries.
Hope this is helpful.