You shouldn't have asked... Everyone is going to tell you what they told me, do Not get it...(Someone said they wouldn't even use it to throw at a stray dog..) Talk to Doug at bamachips.. is what they'll tell you. Don't get me wrong, Bamachips are excellent products from what I hear with top notch customer service and customization, also take a look at SCT tuners..
As for your questions, the chip plugs into the back of your ECU, the installation is quite simple. Unbolt the cover to your PCM which is located in your passenger side firewall, and unplug the wiring harness, undo the two bolts on the clip holding it in and pull it out, you have to clean the contacts on the plug before you can install the chip, once installed.. Clear your PCM by unplugging the negative battery terminal, wait about 10 minutes and plug it in, start that sucker up and drive. You can run any octane gas with these chips at the cost of performance. It's perfectly safe to run cheap gas though.