I have a 2000 LS V8 with the Alpine cassette \ 6 disc changer in the glove box. I really like the new THX touch screen radios, does anybody know if it is possible to put the THX unit in the 2000 LS? If it is possible, what all would I need to get to hook it up, such as wiring harness changes, different amps, the navigation unit, or what. I have the factory subs with a seperate amp, do you think they will still work with the other 6 speakers? Thanks for the help guys.