Hi, i'm a new member having recently acquired a 2002 LS430 (my second as i had an LS400 a few years ago). I have bought a 2004/2005 updated DVD for the Sat Nav system on Ebay and am not sure how to install it. I have tried pressing the button next to the disc slot on the drive unit in the boot but nothing happened- also when finally install the disc, is there a particular procedure i should follow to get it up and running? Thanks for any help.