I am not sure that this is the right place to post my questions so i apologise to mods and admin if i made a mistake...
Mainly,my problem is that my english is not so good(i'm croatian),so it's hard for me to completely understand any guide that i found,what i actualy mean is that i can understand some frequent basic words but i don't have a clue what hexdump means for example,or checksum...there is a lot more words i don't understand but first i want to be sure if anyone would like to help me explain those terms...Cheers...

May be you can start here: http://www.ecuedit.com/dictionary

Hexdump could be the ECU file and the checksum is like a verification number of that file.

Thanks a lot...
So,if i'm understand it right,damos is actualy a most important thing if i want to do anything...without damos i don't know what i'm changing in file...

I get some damos collection but most files look like this for example...Clio1.5 dci...i don't know which year,what version of engine,doest it have dpf/fap...How can i found more info about my damos?