The DE-OpenBlackHole 1.4 image has built-in the DTT drivers that are recognized. You cannot install as there is no feeds available anymore and were in fact never. So all what is in the image is all what you have. If your DVB-T is not recognized it means it wasn't available back then for these images.
In 2009-2010, when the Sim 1.0 images were built, there were no Sky Digital Key in existence... so no drivers yet were built. These appeared at mid-end 2011 and not for all Kernels (2.6.18-7.4 minimum, and for OpenPLi like images), Dreambox Enigma2/images had available and working only Hauppauge NOVA-T and the AF9005 (No other were saved or worked).
For drivers, the best tip we can give you is to UPGRADE your Sim 1.0 to Japhar (
http://www.japhar.com/japhar/) and you will then have all known drivers available thru the feeds for the images built that you can find on the Japhar DM800HD section below.
New DM800HD images from 2018/2019 (Japhar) :
http://www.ourdreambox.com/ubbthreads.php?ubb=postlist&Board=47&page=1Images such as OpenPLi 4.0, 6.0, 7.x available, BlackHole like images as well (based on OpenPLi), and many more like OpenVision as well, etc. All these have feeds and so the drivers available... and supporting the new protocols after Satellite, Terrestrial and Cable, as well IPTV Protocols.
TS