How can I use my Ti-89 for physics

[whywastetime]

****Program is not working can u help Me access it?

@Wesley_Clark

[u rl]Physics Solver v1.2 - ticalc.org
I never even thought about that. That website says it has all the common intro to physics equations written down and can save me an assload of time if I download it into my Ti-89. Only problem is I have heard alot of calculator downloads are infected or can crash your calculator. Does the calculator have some kind of backup or defense against crashing or infection?