Need Help! EZ Trak tool length offsets..

Hi guys,

I have a 2 axis Bridgeport EZ Trak DX and I'm tring to figure out howto set up the machine using multiple tools. I am using offline software (Bobcad) to create the programs so I basically load the G-code in and run.My machine runs the program fine but I don't see where to set up the tools to set the Z offsets. I use to have a V2xt and it was easy to do this. Anyways any comments will be helpful.

Thanks