Please don't click on the EXE or BAT files in a Windows Folder! 
Installation instructions below

This add-on package is for LCARS 24 version 3.1.1 or higher and is 
to be installed in the same manner as LCARS 24 itself, normally to 
be transferred by floppy disk to drive C: of the destination machine, 
DISK-B1.EXE and ADDON2.BAT on the first disk and DISK-B2.EXE 
on the second. 

Once that's done, typing ADDON2 instructs the batch file to distribute 
these files to the correct folders and create one new subfolder. 

What to they contain? 

A large scrollable map of Mars, two large charts of Alien ships seen on Star 
Trek, various Trek-related jpegs, and three SMFL files (with their 
accompanying image files that go into a new subfolder called ENTGALRY), all 
part of the LCARS 24 Library, accessed from the menu called when you 
press F5 with the main (clock) screen displayed, plus several voice files not 
included with the main package.