Not sure if I have put this in the right forum, but looks like the NFO viewer iNFekt now has a PortableApps version to go along with the other versions:
http://code.google.com/p/infekt/downloads/list
AFAIK, this is the first version to feature the PortableApps installer - the previous 0.8.1 only had the standard .zip portable editions.
I've already downloaded it and made a couple notes. No issues so far.
Previously known as kAlug.