I think your 2004 fob might be useful - not sure if the 2004 and 2005 transmitters are compatible, but you might be able to use the 2004 to open and close your doors remotely. You need the key and the RFID chip to be specifically made and programmed for your car, but your car can be trained to work with the open and close function of the key transmitter if they are on the same frequency: 2004 used 433MHz, 2005 used 433 MHz and 315 MHz (Yes, those are the frequencies of the TPMS, but that's also the frequency the SKREEM uses as well.)
-Jerry