What or how do I install my Skyfi2 in my car without a tape deck?

Do you have a newer one (red and yellow box) or an older one (bubble box or white box?). If it says 'direct connect' in a reddish box it has a really cruddy FM modulator, if it is an older model from the clear plastic bubble box or white box, it has a really, really strong FM transmitter in it (so strong, the FCC outlawed it) and you can use it to transmit to an empty FM channel (within 50 feet of your radio!) So my answer is, simply go to the 'MENU" and under "FM Frequency" select an empty channel in your area, like 107.3MHZ and then set your car radio to 107.3 FM and it will come thru. You can also adjust the "Audio Level" in the MENU to make it even louder. Should work real well, Just check at the very ends of the FM band for channels first and try to set it 2 channels away from an active channel, so if you have a station on 106.5, you want to be on 106.9 or higher, etc.. Okay?