What is the best way to move aps from default grp to new grps in SZ300.

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We have over 100's of ap's under Zone(ABC)- Grp1-Grp2-Defaultgrp. I have the mac address of the aps grp wise. Is there a way to move ap's based on mac address from default grp to say grp1. i dont want to select ap one by one in GUI. Any suggestion will be appreciated.