It's rendering in 2 instances with 2 cores each and the left half of the image with 2% overlap, which is just enough for this resolution, is finished after 13,5 hours
Now I just have to let the other instance use the other 2 cores as well and this should be finished tonight!
I'll send you the .bmp by e-mail and if it doesn't fit your mailbox it will be .jpg with lowest compression.
Martin
edit: finished!