Note: This procedure requires editing a game file; creating a backup copy of the file before proceeding is recommended. With a text editor, edit the "bridge items" file in the "\activision\sfc3\assets\common settings" folder. Find and highlight the highest valued cloak and copy it. It should look like this:
Paste it to the bottom of the list and change the race "R" to "B" for Borg. Note: You can also change the mass so that you can fit it on any ship (down from 700 to 100). The edited portion should look like this:
Exit and save the file. You can now have shields on any Borg ship. You can also experiment with many of the other values in these files to change other ship parameters. Be careful, as this can cause the game to crash if you change the wrong value or make it too high or too low.