Say one of these prayers after if you receive any responses during your spirit box session that say “help…..pray/prayer”……or “purgatory.”

Catholic Prayer for the Dead:

God our Father, Your power brings us to birth, 

Your providence guides our lives, and by Your command we return to dust.

Lord, those who die still live in Your presence, 

their lives change but do not end. 

I pray in hope for my family, 

relatives and friends, 

and for all the dead known to You alone. 

In company with Christ, 

Who died and now lives, 

may they rejoice in Your kingdom, 

where all our tears are wiped away. 

Unite us together again in one family, 

to sing Your praise forever and ever.

 Amen.

El Maleh Rachamim is the actual Jewish prayer for the dead:

God, filled with mercy, dwelling in the heavens’ heights, bring proper rest beneath the wings of your Shechinah, amid the ranks of the holy and the pure, illuminating like the brilliance of the skies the souls of our beloved and our blameless who went to their eternal place of rest. May You who are the source of mercy shelter them beneath Your wings eternally, and bind their souls among the living, that they may rest in peace. 

And let us say: 

Amen.

The language used in the prayers for the departed can be very reserved, but will bring peace, rest and freedom from pain and sorrow for certain spirits. Cite the following from the Liturgy of St James:

Remember, O Lord, the God of Spirits and of all Flesh, those whom we have remembered and those whom we have not remembered, men of the true faith, from righteous Abel unto to-day; do thou thyself give them rest there in the land of the living, in thy kingdom, in the delight of Paradise, in the bosom of Abraham, Isaac and Jacob, our holy fathers, from whence pain and sorrow and sighing have fled away, where the light of thy countenance visiteth them and always shineth upon them.

(Sources: http://en.wikipedia.org/wiki/Prayer_for_the_dead )