Alarm/Remote Start & Immobilizer for 2001 Pathfinder

[ipexunlimited]

I wanted to add a Compustar 2WSS-AS to my '01 Pathfinder. Is this incredibly difficult to do? What happens with my engine immobilizer? Will it be disabled or defective? Will my factory alarm be removed? The bypass module for the immobilzer, is it a good idea? Hopefully thinking of making the purchase within this week. Hope someone can help...