Questions about H3 4wd System

[Thai]

Hey all,

I am seriously trying to convince my brother and his wife to get a Hummer H3. He has a Rubicon. He likes to have something that is more comfortable on-road and roomier, while capable enough for vacation in Colorado or Utah. I would assume that he would go for the Adventure package, along with side-curtain airbags and automatic tranny (wife cannot drive manual).

A few questions regarding it's 4wd system (it's not crystal clear on the Hummer site):

1. Can you lock the rear locker in 4-HI? (not a big deal, but just asking)
2. When you lock the rear locker, is traction control still acting in the front axle??
3. I have heard that Adventure package has different springs and shocks??? Is this true?? Does Adventure still have Bilstein shocks??
4. Since it's an automatic tranny, it comes with stability control (which he likes on-road). When you are in 4-HI or 4-LO, does the stability control shutt OFF?? (big issue)
5. Does ABS have a separate off-road algorithm??

Thanks a lot in advance.
Thai.