If it's lowered more than 2" then YES you will need camber kits. Any thing above 2" is marginal, really up to you because the camber change isn't a lot. There is a cheap way for the rear -
www.tirerack.com look into the Ingalls bolt & washer kits. For the fronts I'd go with Ingalls but SPC is also good.
This is how easy the rear is -
http://home.earthlink.net/~civicex95/rearcamber.html Just don't use cheap ass hardware as shown in the link. Buy Ingalls or grade 8 or better bolts.
Toe can be set to factory spec's without any special kits, it's all in the tie rod ends.
Yes it can be aligned to spec with camber kits, as far as Toe, Camber, & Caster go. those are the main points of an alignment. There are other angles that change with lowering but don't become an issue unless it's a race car.
Negative camber eats the inside edge
Toe in/out eats the whole tire
Negative camber will help in cornering but I don't think you will feel a difference after the camber is corrected, maybe a skilled driver would feel it.