I'm trying to buy a plain transponder key for my 1997, for a spare and to use when leaving the car at valet parking. I have found ones that indicate they are compatible 1998 to 2004, but can't get a staight answer on the compatibility with the 1997, I am not aware of a difference in the 1997 ingnition and the 1998 ignition. Is anyone aware of any differences that would not allow me to buy the non remote key for the 1998 and have it programmed for my 1997 boxster.