How do you bypass the immobilizer on a 2002 Renault master?

i have the same problem with my 02 master and the only way to get it sorted is to buy a new key from Renault £105 i just paid and have to wait from 7-10 nday for delivery to the dealer and then i have to tow my van to the Renault van center to get the key programmed, there was one easy way round this which i didnt think of but now i have learnt NEVER BUY A RENAULT! nothing but a money pit my van and its only done 60,000 from new!