Thanks spam2000. That sounds good I will try it if I get my hands on the 6.1 disk. I still think I would prefer to keep my 5.1 just in case I can't get it working. Maybe what I will do is try making a copy of my 5.1 and see if it works in my car. Then I can keep the copy and if Toyota is requesting the 5.1 in return for the 6.1 I will be set.