All right so I have three questions about force cages.
1. How do you get people inside them? (I tried but the NPC spawned outside of it)
2. How do you make the Force Cages sound like they are on?
3. How do you make it impossible to enter the force cage?
KotOR or TSL?
1.The force cage of which you speak.... has there been an NPC in it before?
If so, you can find the whereami coordinates for that NPC in the corresponding .git file using KGFF. Look in the Creature List for the name of the NPC you saw in-game.Then, use those coordinates to put you inside.
2. This is ambient music. You would need to make a sound for it, or use something from the game files you think is close enough, and have it playing in the background for the module while Force Cage is energized. I am not a sound modding expert, but I have seen tutorials here for adding music to the games.
3. This shouldn't be too difficult. Some doors are unlockable. I do not know if the force cage has a .utd, but if it does, you can simply edit that to be unlockable, probably just a KTool edit.