I cannot answer your question 100% guaranteed, but to the best of my knowledge you wont be able to use your old tune on a different Eclipse. You have to register each cars vin number to each licensed server with Hackish. Thus not allowing you to tune your new car with your old setup (not identical vin #). If you were able to do so, I could take Hackish's tuning software and tune your car for free sense I am registered with Hackish, which would cut into his profits.
This is just my best guess seeing as how Micheal would loose lots of money if you could tune any Eclipse after buying his reflash. Best thing to do is contact Micheal and do your best to see if he can set you up sense you are a returning customer.