You can use the manual scan option, in Menu, Setup, Service Searching, load a channel list, or use Dreambox tools like Dreamboxedit, or Dreamset.
It is wise to backup your channel list, and Bouquets, using one of the Dreambox tools, when you've completed setting them up.
Are you trying to use multiboot?
You first stated that you wanted to update your channels, now I'm not sure what you're trying to do.
I can tell you that Blackhole is an image for VU+ receivers, not Dreambox receivers, as it's based on the official VU+ image.
There was a version, of Blackhole, for Dreamboxes, but it's nothing like the genuine Blackhole image.
Dreamboxedit is a program, that runs on your PC, and connects to your Dreambox via the network.
Can you please provide more detailed information, regarding whay you're trying to do, and the problems you're facing.
I use multiboot, I have in flash the Blackhole image, I have in penDrive the images Gemini + Blackhole,
What I can not do is update the channels in the penDrive images without being manually.
As I had the box turned off 18 months, I can not remember how I did it.
(The DM800HDPVR works great with blackhole.)
I know how to operate with Dreamboxedit, DCC, DreamUP OK?
1st the image I have is NabiloBlackHole, sorry for the mistake.
2º as to the frequency of the operators that were interested
LyngSat was only manually put the Frequencies, the SR and the FEC
Thank you for helping