What is the best way to switch only 1 member from a team?

My situation is a druid + 4 melee team named melee and I would like to interchange the druid with my DK from my team named DKsham for arena games.

I have added the DK to my melee action group list for IWT actions but because IS still thinks I have the druid running, a lot of the FTL macros that are generated using the druid's name don't work for the DK. What's the easiest way around this or do I need to create a new team setup in Isboxer that has the DK and the 4 melee and switch to this?