http://www.jmu.edu/computing/desktop/wireless/wm_library/OfficialWireless-WindowsXP.pdf
My daughter's XP with SP3 has WPA2 capability, but from a Zydas program that came with her wifi device. So, it's possible.
All about it and WPA2 PSK
If it doesn't show just those, then go to the search box under comments and put WPA2 into it.
http://www.amazon.com/review/R2QOK7C8TAT3AN/ref=cm_srch_res_rtr_alt_1
Works well on my old XP laptop!, February 3, 2014
By K. Perry
Verified Purchase(What's this?)
This review is from: Panda
Ultra Wireless N USB Adapter (150Mbps) - 802.11n 2.4GHz - Compatible
with Windows XP/Vista/7/8/8.1, Mac OS X 10.4/10.5/10.6/10.7/10.8, Mint
14/15/16, Ubuntu 12.04/12.10/13.04/13.10, Fedora 17/18/19/20, openSUSE
12.1/12.2/12.3, Puppy 5.6, Lubuntu 12.10/13.04, Kubuntu
12.04/12.10/13.04, BackTrack5 R3, Kali Linux 1.0.3, Raspbrian Wheezy and
OpenELEC (Personal Computers)
I have an 11 year old Windows XP laptop which I connect to the internet via a 10 year old NetGear WG511v2 card.When
I recently moved and Verizon Fios upgraded my wireless router to their
latest and greatest router, all of a sudden my old laptop would not
connect to my wireless network.After some frustration, tech
calls, and intense Google-ing, I discovered the reason was that my old
WG511v2 card did not support WPA2 network encryption, and only supported
the older, less secure, WEP encryption protocol's. I was left with two
options... upgrade to a wireless card that can handle WPA2, or manually
switch my new router to the older WEP protocol.Sooo I tossed my old card in the trash and ordered this one which stated it works with WPA and WPA2 encryption.When
it came in the mail, I installed the drivers as per the instructions on
the CD it came with. I plugged in this little guy, and BOOM! I was back
online within minutes. I even got a friendly email the manufacturer
(through amazon) saying to contact them if I have any questions. Since
set up was so easy I didnt need to call, but it was nice they did that.The
only negative I have noticed thus far is signal strength. My Verizon
Fios plan gives me 50Mbps/25Mbps-Upload/Download speeds. So I should be
able to acheive 25Mbps since this states it can handle up to 150Mbps..
however even when I am right next to my router I get 10-15 max. This is
still by far enough to browse the web, download MP3's, stream youtube,
etc. However if I try to stream and browse at the same time, or while
downloading MP3's, things slow down a bit. And if I am a couple rooms
over or outside the signal gets even worse.I dont mind the
slightly weaker signal, especially since it is a small unit and it so
cheap. Plus I only use this old laptop for web-browsing and updating my
iPod. All of my gaming and streaming is done on consoles or my iPad
anyways. So I just needed something to connect my old dinosaur of a
laptop and this did the trick.If the signal strength was better I would have given 5 stars, but all in all as long as it doesnt break, Im happy.If you want an easy, inexpensive, way to connect to networks with the latest protocols, this little adapter should do the trick.EDIT:
I fixed my weak signal problem by enabling "Windows Zero Configuration"
in XP. This solved my weak signal issue and now this little bad boy is
giving me 70+ Mbps, which is more than enough. It also maintains good
strength in adjacent rooms from where my router is. So I upped this from
4 stars to 5.Now I can keep rocking my 10+ year old XP Laptop!

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