using a 556u remote start interface

I'm putting a Code Alarm CA670 in a 2006 Pontiac G6 and I'm trying to find out whether or not the key that will be used to start the car after the install is complete will need to have the transponder chip in it or will just a basic key work once the 556u is in place. I know the key that goes in the 556u has to have the module and what I'm thinking is that a copy of the key, minus the transponder chip, will work in the ignition since the transponder is already in place with the 556u.

I might as well as this too while I'm making this post: anything fancy on the door locks? I'm thinking it's a negative trigger but I havent researched it yet.

Thanks in advance!

Okay so a chipped key in the 556u and 1.5kohm resistor on the unlock wire. what type of lock configuration is this?

also, what module do you guys use and how is it different from the 556u? if it's more cost effective, then I may go with it.

I appreciate the suggestion for the 456L but if the locks are negative trigger, then all I need are two relays and the resistor. That would decrease costs a bit and would be quicker for me really (I have relays already). I've never used a resistor on a negative trigger though. Is this a newer feature for GM?

As far as the keys are concern, I may consider the PKU-GM2X from the site (bypasskits.com). Thanks for that suggestion.

Just to confirm though, *if* I go with the 556u, then I use a chipped key in the module and a standard/non-chipped key for everyday use, correct? Out of curiosity, what's the difference between DEI's 556u and 555f? I used the 555f before on my wife's mustang (though I cant recall the thing with the chipped vs. non-chipped key) and still have it among my supplies.

Thanks for all the input thus far.

I found this link: http://www.velocitymotorsport.com/images/install_notes/144.jpg 

I'm wondering if it is an accurate illustration for wiring the relays for the single wire negative door locks on this car, using a 1.5kohm resistor