Wireless PCI-E card for the M1530

I have a M1530 with the Intel 3945 ABG wireless card. Due to an issue that I am having with the VPN Client, I have been thinking about trying the Wireless-N Version - Intel 4965. 

However, I'm not sure which Dell part for the Intel 4965 is the correct one for a M1530?  To make matter worse, the numbers on the Wireless card that I have - "Model: 1514B-3945 ABG; Dell P/N ONC 293" appear to be well hidden on the Dell Website. 

Can anyone provide me the order number, or part nos. from an actual card in your M1530, such that I can track down the correct part. 

By the way, I tried a Intel 4965 card, Model: 4965 AGN MM1, Dell p/n: OMK933.  The card works (i.e.: you can access the web), but the Intel Pro Set Utility does not work with this card.  I even tried the latest Intel Software without any luck.