Eh? You don't understand removing the 4th and 8th digits of a key.... ?
Its not technical Satellite Stuff, simply MATHS (I wasn't good at Maths but simple enough to remove 4th & 8th bit of key)
example keys (not real keys):
Key: 1122336611223366 OpenBoxKey: 112233112233
Key: 774400BB774400BB OpenBoxKey: 774400774400
Key: 1111113311111133 OpenBoxKey: 111111111111
Remove RED bit and BLUE bit from the key you take from Biss/Control Word Key section of forum because Openbox not use, ie first two numbers = first bit, second two numbers = second bit. So remove 4th and 8th bit or if you like (in simpler terms) remove the 7th, 8th, 15th & 16th number (Remembering in HEX A, B, C, D, E & F are also classed as numbers).
Understand! ?