So, I bought a 2004 Lexus LS430 on Wednesday.... Unbeknownst to me, the key that I was given at the time of sale was only the valet or subset key. I cannot use this key to open any other door, pop the trunk remotely, or take advantage of the handy dandy smart key feature (have to put the key in the ignition). Aside from taking out a small loan to have a new key created, are there any other options (i.e., do it yourself key programming after you purchase the key for a mere $150 bucks)? So far, the dealership has told me that I need to reprogram the entire ECU to get a new smart master key. Please help!