Obdii365.com Engineers Solution:
Depending on your computer hardware, you could install XP and your app in a Virtual Machine (VM) from Windows 7. Once installed and configured, you would boot your computer like normal and start XP in a window.
VMware makes Virtual Machine software called Workstation v10. They have a trial, but expect money at some point. The second best option for VM software is called VirtualBox from Sun. It is free!
You would just need a compatible computer, a copy of Windows XP and time to learn the ropes and get your XP Virtual Machine (VM) up and running. Learning how to use it is a one-time thing and at that point you’ll be familiar with VM software in general. That is a huge benefit to have as a computer user.
At that point you would meet the requirements of the GM Tech 2 software and would install TIS2000 within the VM and use the virtual com/serial port to connect to your computer serial port (or USB).