You have rotors. You'd have to unscrew the entire sprinkler from the pipe and replace with the MP rotator bodies. Unfortunately, the rotors are usually 3/4" FPT threaded whilst the MPs are 1/2" FPT so you'd need an adapter. That could theoretically be done without digging (you'd require an extension riser because the MP rotator bodies are shorter than the rotors) out each sprinkler just by unscrewing the old one and screwing in the new one, however, you run the risk of dropping dirt in the hole and if the sprinkler is on bent funny pipe, it will possibly bend away from a vertical position when you take out the old sprinkler making putting the new one on challenging to impossible. Digging out each one is probably going to be your best option.
The biggest issue, which is what g-man was referring to, is that the rotors usually cover around 30ft+ areas whereas the MP2000 are 18-20ft. So replacing rotors with MP2000 will not cover the required area unless your rotor throw distances were only set up to cover 18-20ft distances. The MP3000s do about 30ft lengths.
On top of all that, you would need to make sure that the GPM for the MP rotators does not exceed your zone maximum. Each rotor uses the same amount of water per minute regardless of the angle, but MP rotators use varying amounts of water depending on what angle you have them set to.