Do a search on a Z6 swap on google or something, there are a bunch of how-tos explaining what all you need to do, they answer all of those questions, minus the fuel injectors, which if you use the Si harness i don't see you having to run extra, but from what i have heard its easier to just use the stock DX harness over the Si.
if i wasn't on dail up and lazy i would get you the links. I know
www.4thgenerationcivic.com used to have a few links on it, but last i heard the site was down, could still check though.