my advice is it may not help. modify the notebook "to work with 11.x" instead.
why is that there are few things that are going to "work easily" using the 5.2 compatibility (many things may still be broken or even impossible), and the time spent dealing with that can easily outweigh the cost of upgrading notebook to run, also the results are better upgrading to / using the new functions.
try both but don't go "all in" on using the 5.2 compat package until having tried both
