at,
lie and lie big. then find the weakest part of thier system and write something that works but is unintelligable to anyone else - or if you're a bastard requires your weekly fettling for it to continue working. have a read of THIS for inspiration. there, that's the big secret to the business world, use it wisely.....
cheers
julian.
note: this post was 50% bullshit, 30% arse and 20% real life.