compact chips and immobilisers

[mr cheese]

got a couple of e36 316 compact chips and wont start the car on further investigation seems there for a non immobiliser type compact how can you disconnect the immobiliser to allow the chip to work as i assume its not detecting the correct chip code so immobilising it.
i want to try the chip as its supposed give a good power improvent, every little bit helps with a 316
its r reg so the cars not worth nicking so i am not bothered about the imob