OK, I wish I had read that an hour ago....
I decided to try it anyway... You'll never guess what... yes I had a nice 182 shaped silver brick on the driveway....
With the help of Ross-Lakin I now have my car back... All be it I now have to use a special version of the software or it wont pass the security check.
So DO NOT TRY AND USE SOMEONE ELSE'S POPS AND BANGS MAP!!
Its annoying because it doesn't state anywhere on fastchips site that they are unique.. Neither does it state that it wont work in the software.. It was all ok and green right up until the end when it simply threw a "Write Verification Failed" error flagged up at the end....
Off to pay for it now...