Alright, I´ve made some progres..
Trough this site
POSSIBLE SCREEN OF DEATH - HTC Forums I came hier
https://android.clients.google.com/updates/partner/signed-kila-ota-148830.de6a94ca.zip
This zip file is nog up anymore, downloaded it somewhere else & renamed it to update.zip, placed it on a sd card. Booted the phone with the home en power button, -> ALT + L -> ALT + S.. This is the first rom which is going to install..
Installing from sdcard...
Finding update package...
Openen update package...
verifying update package.. takes a minute
installing update...
formatting boot
extracting radio image
formatting system
copying files
After this a manual reboot with back & power button, the phone shows a kind of chip met a arrow, automatic reboot, show a white box with a arrow pointing to a phone, automatic reboot & again the rainbow screen.