I just purchased an 08 IS250, and was chatting with the dealer about the personalised settings.
The personalised settings are things such as lights off when car is locked, or after a 30second delay, windows opening when the unlock button on the remote is held down etc..
The sales person claims that this is only available on the 09 model, however he is going to check with his technicians to be doubly sure. I suspect that this is something they will not do if they are unsure about and/or for liability reasons.
In the meantime, has anyone else had their settings changed?