Need Your help to install UT on Xperia z4 Tablet

[z4Tab]

The support of the xperia z4 tablet is like an early Christmas present for me. But unfortunately I fail because of the installation or the preparatory steps.
(https://devices.ubuntu-touch.io/device/karin/)

It works until step 8 without any problems. But at step 9 I have profound questions.
When I unpack the archive / firmware file (https://developer.sony.com/file/download/software-binaries-for-aosp-marshmallow-android-6-0-1-legacy/), I don't get a firmware file but a directory with many individual files. Of course, I would have expected only a single * .img file, which is flashed in step 9.

Who of you managed to take this step successfully? What are the details in step 9?

Additional question, if I can manage step 9: In which mode (Flash / Fastboot / Recover) does the Xperia z4 Tab have to be for the following installation with the UBports-installer?

I would be a happy person if I could make it to Christmas!

[cigini2359]

Same issue. Maybe it was a mistake to say "unpack them"? Could it be that we should just flash the downloaded zip file as is?