here is an easier option.. usually works easier if you have a manual though...
If you have a 'cheaper' varient of the cyclone immobilisers, then this should get ya going.. turn the ignition to 'on' and leave the car there for approximately 35-50 minutes, if you have an electric fan, disconnect it, unless you have a manual which you can push start when your battery dies. Thats why this is easier with a manual. Go to the car after 40ish minutes and try turn the key, if it doesnt work, wait another 20 mins, if that doesnt work.. then im stumped you have to go cutting
I KNOW and have seen this work to alot of cars, this works on stock vt commos as well.