Hi Paul
Firstly you do not mention the model of the stb which does not help with getting a response from people unless you are referring to the SF 1008, it is however not a common machine and as you have discovered support appears to be very thin on the ground. There is a German site that supports them but you will have to use google translate to convert to English
-http://translate.google.co.uk/translate?hl=en&sl=de&u=http://octagon.gmc.to/&ei=CM3nS_uyJ4Hu0gT8_aHPBg&sa=X&oi=translate&ct=result&resnum=2&ved=0CB8Q7gEwAQ&prev=/search%3Fq%3Dsupport%2Bfor%2BOctagon%2B1008%26hl%3Den