Cummins Insite/ECM update question?

[JMBT]

Hello all!
I am running Insite 7.6.2 with Inline 5 - no problems. I am interested in learning how to do my own ecm updates. (Not looking to change any parameters or anything.) I've heard that any of the new ecm updates will lock you out of 7.6.2 and will force you to upgrade to the 8 version. If this is true, I would like to avoid that!
So, assuming I can get the file that I want to upload to my ecm, can anyone help me understand what the process is, like what extra programs I need to find?
If I know what it is I'm looking for, I think I can find it, just need some help to get headed in the right direction. Any advice or insite hahaha is appreciated! - Miriam