I hade some issues while installing the Miroslav Philharmonik 2 library. Part 1 failed at the last 99-100 % of the installation... I searched around and found that others also had run into this issue like here:
https://cgi.ikmultimedia.com/ikforum/viewtopic.php?f=12&t=11405
After that I found the very simple solution to the long filename problem that happens if one unzips the installation folder to deep in a subfolder. I just moved the installation folder for part 1 to the root of that drive and then the installer worked without issues
Just want to share this experience with you since it can be useful information to anyone trying to install this instrument. I also made a ticket to the support about this information since it could be useful to share in the FAQ