If you are crazy and have alot of time it is possible to run new speaker wire through the weather pack conectors at each door. With a small drill you can drill trough the unused parts of each connector and feed your speaker wire though. Making sure that both sides line up is the hardest part.
Be very careful as one screwup will disable you power locks etc... !!!
Then all you have to do is route the wires under the carpet to your amps.
