The only ROSHEIM I know is in France (Alsace - Bas-Rhin).
But there is a ROSENHEIM in Bavaria (see http://www.stadtarchiv.de/ in German)

Eve Line Blum-Cherchevsky
Besancon (France)
and also
Cercle de Genealogie Juive (International JGS in Paris)
http://www.genealoj.org