Let me guess, the reason you want to remove the immobilser is because its a problem, am I right? Well you chose to buy a Renault and now your paying the price. As you've found out at great expense Renault electrics a rubbish. The cheapest way out is take to a scrappy and put the money you get towards a decent car, but not a French one. This is not only my opinion, but a auto electrician who worked on Renaults
DB, June 2011