Is the Cameo Talent Agency (in Machusetts) a S.A.G. agency?

No, they are not. Maggie, Inc and Model Club, Inc are the only SAG-franchised agencies in the Boston area. I don't know about other areas. Here's a link you should check out: a href="http://www.sag.org/branches/boston/local-resources" rel="nofollow"http://www.sag.org/branches/boston/local…/a