Just an update I have successfully managed to downgrade the Rnse MK1- 192 D by buying a second hand 2004 nav-tech dvd downgrading to that then with an awful lot of help from waiapasi2006 who I OWE THIS VERY BIG THANK YOU TO! I really appreciate all the help you gave. Using the download link a few picture emails I figured it out and added some files from the 2004 dvd to the 0800 vim modified cd burned with image burn and viola My rnse downgraded and adaptation 5 is at 250 yaay! but the joy ended early as it is asking for a pin the I was given (last four digits of the serial) is no longer working??? also can anyone out there confirm whether I can recode the A4 2004 Rnse mk1 unit to an A6 unit?