Theislander:
Sentinel LM is a large subject and there is a great deal of information about it on the web. It is also not an "easy" subject to master, particularly in a few days. "Gathering a bit of information" does not really meet our requirements when there is, or may be substantial information available on the web, for those who search.
For example, using the obvious "google" input: "vendor string to unlock all options" (without the quotes) I quickly discovered that this is not the only Forum you have posted this identical "request."
Since we expect posters to do their own research "before" they post, I suggest that you stop what appears to be a degree of laziness and expand your search criterial and YOU start reading what YOU wil find.
Adding to the google search listed above a couple words would be a good place for YOU to start on your journey. Try:
vendor string to unlock all options Sentinel Lm
and YOU will find a great deal of more focused information which YOU should start reading to inprove YOUR knowledge. This will lead you even to some of CrackZ' information on the subject WHICH ARE AVAILABLE RIGHT HERE ON WOODMANN.COM.
In other words, "YOUR" personal effort is being called into question and that is one of the things which "WE" expect, as a minimum, of those who seek help here.
I am not trying to discourage you or your efforts. I am suggesting you use "YOUR" brain and do some of your own homework, instead of asking others to do it for you. The advancement of "YOUR" knowledge of "reverse code engineering" will benefit from the experience, and it is the only true way to advance your knowledge base.
Much information is available for those who make the journey of seeking it out.
Regards,