It shouldn't fail. The only condition that would cause the blackbird drivers to fail is when you install ivtv and cx88 packages, because they have overlapping files.
What I'm confused about is the message you got. Namely: "install script already exists" and "compile again".
We'll do some tests here and see if we can reproduce your experience.
If it's not too much to ask, can you tell me your installation number so we can try and reproduce your problem with the exact installation as yours? No activation code please, just the installation number.
The install number I used is 37956.
Thanks for looking into this.
One last note, on subsequent reboots of the core it attempts to install them again, fails consistently the same way... "install script exists".
Hope this helps?