Studio 1747 Wireless Upgrade

I'm thinkng of purchasing a new 450mbps router but in order for it to work I need to upgrade my present wireless card, Intel Centrino Advanced N 6200 to the Advanced N 6300.

I was wondering if this laptop:

1) supports the 6300 since it is a 3 antenna card

2) If installation is as easy at they make it look since I only hace a 2 antenna card installed now

Thanks!