[chris15]

Are you running a separate amplifier for your speakers? If so, check the Status indicator light (should be green or red) for that amp and see if it turns on with your stereo. If not, check the fuse on the amp.

If you don't have an amp, unfortunately you're in one of two circumstances: you've blown your speakers (highly unlikely that you'd blow all of them at once), or a connection has come undone.

Also, when you refer to the 'fuse box under the hood' are you referring to the fuse panel that's inside the interior of your car? Or an in-line fuse that's on the power cable from your battery to your amp?

When you added your aftermarket stereo did you use wire connectors or did you solder all of your connections? Either way, this is most likely the culprit of your problem. Unfortunately again, the only solution for this is to disassemble your dash and center console again and check all of your connections.

It sucks, but believe me, I've been there-- done that.
Let us know how it goes.