What you seem to be missing is that COPY root/*.* TO *.* should grab everything in the root folder and copy it over, subfolders and all. You shouldn't need to specify each folder separately..
Actually COPY root/*.* TO *.* will only copy the calendar.php to the phpBB root folder and nothing else. It is now a known problem with the MOD and can be corrected easily. If you don't care whether others are adversely affected by this, you have a right not to care. But as long as this COPY section is not corrected, there will be a lot of people coming in here with the same problem simply because Ptrihiik is too stubborn to fix it. And on top of that, he will blame EM for not working correctly, which is not true. EM shouldn't have to comply with Ptirhiik's standards, but the other way around...
When Ptirhiik owns phpBB, then he can change the rules. Until then, he is just another MOD author who should be expected to make sure his MOD installs properly with EM just like all the others. Since his Topic Calendar MOD is causing problems, everyone should expect him to fix it, including you and the phpBB Team Members. Or are we now promoting alternative BBS by making sure our MOD standards are set as low as possible???