Hello who told you that you needed a master default disc?the reason it flashes unable to read disc is because the disc in it is the wrong disc or in your case a copy(the system doesn't like copies).As yours is a 2001 model pretty sure yours is CD Rom based,pm ACLex on here (he is the LOC parts dealer)and he should be able to help you out,he is very knowledgeable,he may require you vin number so have it to hand.If you want his number pm me,don't think it will cost you £150 either.