User blog comment:Snfonseka/Mass Effect 3 Modding Guide/@comment-121.54.17.12-20120531200153/@comment-958879-20120601034140

DLC weapons... sure; if you know the code. But I don't think DLC class powers are possible. Also you can check this link if you want to ask others: http://social.bioware.com/forum/1/topic/368/index/10759911