audio fan needs alarm help. '01 jeep ZJ

Hello Everyone... I have lurked for a bit on this forum for a while now.

I just got a 2001 Jeep Grand Cherokee Limited and am looking to add a Viper 560XV to the stock system.  What else would I need besides the alarm itself?  I think I need a bypass for the factory immobilizer (grey key), any other relays or anything I would need?

I tried to look at directechs for some information, but apparently you need to be a member.  I am having my friend do the work at best buy, hes MECP certified and hes going to get me a decent discount for the install.  Which online store is most reccomended?  Does Directed have factory authorized online retailers?  I have found some online for relatively cheap, but dont want to get burned and dont mind spending some extra cash to make sure I am dealing with a reputable company.

Also, are mini piezo's effective in your experience(s)?  Or are they more of a hassle.  I am looking at the DEI 513T. 

Thanks so much for your expertise in advance 

damn.  I am out for 7 hours, come back, hit refresh...

any help would be appreciated, paste the wiring setup, or if anyones done an install on a late model grand cherokee....