You can setup something that will do what you are asking. It's not easy and will likely require some changes to your key maps. It's still a manual method that you will have to do after someone joins your group and you will have to restore it once you leave the group.
Do a search for character configuration tool. It is the fastest way that I've found.
Try following the instructions in the link below. If you have questions I can try to answer them.
http://www.dual-boxing.com/threads/4...iguration-Tool
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