If you have a 3D camera and have installed the bundled software, you probably don’t need any of the following as this software installed everything needed to add thumbnail creation to Windows XP, Vista and 7 & 8.
If you don’t see thumbnails of MPO and JPS images, the following links can help you.
IMPORTANT NOTE: Use of any external site is solely at the risk and discretion of the user.
You can search on Google “mpo thumbnails”
https://www.google.com/#q=mpo+thumbnails
We tested two solutions. Here they are, without any guarantee
Registry
http://myplace.frontier.com/~don.munsil/MPO_registry.html