Is there a way on the Droid 2 (I have Gingerbread on it not sure if that matters) to send a group of contacts straight to voicemail?

I know I can do this to individual contacts, but I have a group of people I want straight to go to voicemail, it would be nice to just set them all to this option rather then going one by one. I will have to reset them back to normal after the weekend so I'm trying to avoid having to do this 40 times and just do it once, to a group, and have it work.

Anyone know how to go about doing this?