Is upgrading the Intel WiFi Link 5300 driver ourselves permitted?

I obtained my T400 in November, and notice that the driver for my Intel WiFi Link 5300 wireless adapter is version from 8/28/08.
On the Intel Web site, I've noticed that the driver was upgraded to on 11/24/08:
Are we permitted to install the latest driver (including the Intel PROSet/Wireless WiFi Connection Utility for Windows Vista, or does this interfere with ThinkVantage Wireless Detection, etc.), or do we have to wait to see if Lenovo certifies this version?
Thanks in advance,

Tapatingo wrote:
I think I might have figured it out.  There are two PCI Express Mini Card slots on the T400S (2801).  The shorter slot is for WiFi/WiMax cards and the longer slot is for WAN cards.  The longer 5300 cards on the market cannot be used in the longer slot.  Windows recognizes the cards but Access Connections (or maybe the BIOS) does not allow it to operate.  Can anyone verify this?
Yes, that seems to be the case. I don't have a T400s but I do have the long Intel Wifi Link 5300 card FRU 43Y6495 in my x200. The WWAN slot is the same size as the WLAN slot on my x200. However, as you have discovered, the WLAN slot and WWAN on the T400s are different sizes. A quick check of pgs. 71-74, sections 1050 and 1060 of the T400s Hardware Maintenance Manual indicates that a half-height wifi card must be used in the half-height WLAN slot and evidently you cannot use one of the long wifi cards by utilizing the WWAN slot. So for example the Intel wifi Link 5300 card FRU 43Y6495 cannot work in your T400 but the half-height version of the Intel Wifi Link 5300 card FRU 43Y6519 would work as noted in T400s System Service Parts here. You also have a few other wifi choices listed for your type "2801" T400s.
Have a great day. (I do not work for Lenovo)

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    Maliha (I don't work for lenovo)
    ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]
    IdeaPad: U350
    Apple:- Macbook Air [Snow Leopard]
    Did someone help you today? Compliment them with a Kudos!
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