TBH I got a transmission shop to do it but it's an easy job, you probably need longer hoses or to lengthen the existing ones but mounting the cooler is fairly simple, it just attached to the AC evaporator.
No modifications to the radiator needed, aside from blocking off the unused transmission connections.
If you are interested I can take some pics. Also if you are considering it do look into the best way for your needs. There's positives and negatives to deleting the radiator connections, and some say your should keep the radiator in the loop to aid in warming the transmission from cold.