Inspiron B130 - Adding Wireless

I just purchased a B130 from the Dell Outlet.  Unfortunately it did not have the wireless card option installed, but the price seemed to be worth it.  After researching posts in this forum it sounds like an internal wireless card cannot be added later.  I contacted Dell and the rep told me that "all Dell notebooks are wireless ready".  I asked him about whether the internal antenna comes with the unit even if the wireless card is not ordered with it.  He said that internal wireless could be added later by installing Dell P/N 430-1374 and directed me to sales.  I called sales and the rep stated that this card has the antenna built in.  Is anyone familiar with this P/N and is what I'm being told true?