Things may have changed but it used to be that all custody matters where religion was being raised as an issue were to be sent to the Society.
If they felt it of significant urgency they would provide legal assistance to the local lawyer regarding the religious issues.
If there are no religious restraints being requested, Bethel is not supposed to get involved in any way.
Check out this link for some other suggestions:
http://www.jehovahs-witness.com/6/15618/1.ashx
Let me know if I can be of any assistance.
Uzzah