No no, I tried a cdrw only once, but I burned many CD-Rs, Verbatim, with Plextor and Nec drives... no hope for my old MKIII

For the MK4 update yeasterady, I used one of the CD-R, not the CD-RW.
V26 is so powerfull

The map is much more beautifull

And TMC works well (traffic info in europe, like your sirius ?)
See you,
Thomas