I burnt it to an DVD+R Dual Layer and it works. However, it is slower than original v22 - it takes time to load when you start the vehicle, every time...
The latest version is V27 I believe but I could not find the iso...
A while ago, I used to update the map and burnt that to two single layer dvds, as instructed by some post I cannot remember the link. That worked well as I started vehicle using the first dvd and when everything loaded, I changed to the other. However, it turned into drama when I changed the battery!!! The system could not load anymore and I could not eject the 2nd dvd. Eventually I took the dvd unit out and dismentled the unit, then took the dvd out... It was terrible...