Thanks for choosing my topic...

I have a couple question about ECU... btw my car is 93 Civic w/ JRSC

1. Will I blow up my engine if I program my ECU?
2. What ECU program do I have to get? (what mean by p28?)
3. What is the good company who can do the program for ECU
4. Is chipped is same meanning with program the ECU right?

Sorry for the dumm question.... but I got to know the answer before I program my ECU right?
Thanks again for your time to read my Topic.