I have just started having problems with Foxit when i tried to print.
I found PDF-XChange Viewer that seems to be working and seems to be portable, at least i didn't have to install it.
I'm wondering why you chose to offer Foxit Reader and Sumatra PDF Viewer.
Especialy with the comments on this page.
http://www.techsupportalert.com/best-free-non-adobe-pdf-reader.htm
BTW they recommend Portableapps and PDF-XChange
http://www.techsupportalert.com/best-free-portable-programs.htm#bfp-suit...