Adding 4x6"'s into my Grand Am...What else do I need?

[CentralFC]

So I have some Pioneer 6x9's in my rear deck, but I've needed some speakers in the front door as well, and now's the time to do it.

What will I need besides the speakers themselves? I'm likely going with Infinity Kappas, but if there are other alternative options, let me know. I just need to know what wiring or other accessories I'll need.

Thanks in advance!