UPDATE!!!!! NOW 4 18" FI BL'S RESPONDS N

Im pretty sure if the OP didnt use caps to start, and the annoying picture, people would help you more. As for the 19g suggest for your stereo ..thats one way todo but you dont need to spend that much.

So far no one has really tried to help you, and the one good, but fairly high estimate shizzon gave you, was very far off of what you had to spend, but realistically...he did give a pretty good layout and that would be a good way to go about doing it.

I would suggest doing some reading though, and come with some of your own answers. Just take your time and do it the right way. If you dont want to spend a ton of money you are going to have to learn some things and do some research about what fits your needs. If you have 20g then just take shizzon's list and order it, its a good start.