My last car I did the speakers facing back (seats didn't fold down) Tried it forward, sideways, facing back was only way it sounded good....IF your seats don't fold down.
A day? It took me months to get all my music tagged right so they show up in iTunes and on my iPT like they should. But since that day, I run all new music through mp3tag before adding it to my library.
Well , then you got a sh*tload of songs
A basic ported box is pretty simple
Start here..
http://www.stevemead...or-updated-310/
Torres is a great guy, always helped with my questions
Then search around this site, you'll find many box builds to reference