One a customer wants to upgrade horse power with in the same engine cpl or range, thru insite or with insite pro program and calibration password he is able to calibrate an ecm that has an existent or previous calibration in it. Let say I have a Cummins engine N14 cpl 1574 370 horse power thru insite pro with calibration files(in cal cd's) I superseded or find for cpl 1574 the higher horse power available in the in cal cd's and reprogram ecm with it, using one calibration password count and the proper Cummins inline 5 adapter. Cd one may be for ism or isx, cd 3 may be for N14 or M11, and so on.