I need to know how to install a new ignition on my 1999 Honda Civic LX. I have never installed one before so I need step-by-step instructions if you can. Is there any special instructions for preventing the air bag from deploying? Or any other special instructions or concerns I should be aware of?

This should help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-2.html#post224652