Few questions that might be on some people's minds

1) What risks are involved with a chipped car, meaning possible mechanical problems? (never done it before so I have some concern).

2) Can we ship an ECU, have it flashed to 91 or 93 octane, throw it back in and everything will be fine or will other things need to be tinkered with?

3) What can we expect for a 93 octane tune and what will happen if we have to put in 91 octane if 93 isn't available?

I mean I would love to get this done if we can seriously get about 20 hp out of the deal, btu I don't have the ability to get my car up in the NE. Also, I just want to cover my *** since I don't want something to go wrong with the ECU and be screwed, ya know.