/data/ppe01/synopsys/env-setup.sh
(or /data/ppe01/synopsys/env-setup-2010.03.sh
for the 2010 version) this will setup several environment variables and also add the TCAD binary directory (/data/ppe01/synopsys/A_2008.09/tcad/A-2008.09/linux/bin) into your path.