I think just need to set plugin scan path in CbB preference same as in X3.
But I think CbB installer will inherit almost settings of X3 and it will reflect them to CbB settings. If I remember correctly, CbB installer has asked comfirmation about it while installing.
FYI: This forum will become Read-only is couple of weeks. So I recommend to jump in to New official Cakewalk forum. About new forum, read this:
http://forum.cakewalk.com/FindPost/3806006