Nav Software Update DVD (not map update)

[thudson]

I just purchased the 2014 map updates. The installation manual states that model years prior to 2010 need a software update that needs to be loaded before installing the map updates. This update is on a DVD and can be purchased from the dealer.

I have a 2007 XC90 with the following info on the nav:

SW P/N 0031215600 AA
Map P/N 31210332 AA
SW Version 00000498/02270
Map Version ANA_06_200502H

I'm trying to find the part number for the software update. The number on the box of DVD's is 31421095 AA. But when I look this number up, it's for some DVD that costs around $50. The maps update I have is multiple DVD's that sell for $199 (I didn't pay that much, I bought a sealed box off eBay for $78).

I'm having trouble determining if the $50 DVD is a software update or something else. Has anyone else upgraded the nav software in their pre-2010? Anyone have a correct part number?