As for the medpack, it would be hard to set it to avoid killing you along with the person you tried it on. Unless the medpack can be set to a team specific setting like normal health/death bubbles. I wonder if two health/death bubbles can be added so that it heals player on team 1, but kills player on team 2. But as a result it would deter enemy players from stealing the kit from a dead soldier on opposite team and using it to heal himself (which would then result in killing himself
)
Worst case scenario, you would have to add the death bubble to it with a addtemplate if the medpack doesn't operate the same way as a health/death bubble. Then merely selecting the medpack would activate it.