I wouldnt get a keyfob from the dealer, get one on ebay..... Look for one with this FCC ID: KBRASTU15
Heres an ebay auction for a brand new one...
http://cgi.ebay.com/ebaymotors...wItem
Remote programming should only take a few seconds...
The identity transponder is probably the thing for the homelink garage door opener.....
Your light is most likely on because the new wheels dont have the pressure monitors...
You can download the owners manuals for free at
http://www.infiniti-techinfo.com . That is, unless you want a hard copy. If you wnat a hard copy, youcan get one on ebay for like $50