Portable PuTTY/WinSCP/Psi
There isn't really any conversion necessary here -- these are just very useful, already more or less portable, apps that my team bundles internally in our workgroup along with the PortableSuite... not sure about the licensing suitability for making them formally a part of the Portable Suite though.
PuTTY - secure shell client -- has a stand alone, no install version that works from any directory and stores its config's in the directory where it is run from
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
WinSCP - secure copy (scp) / secure FTP client -- stand alone, no install version that works from any directory and stores its config's in the directory where it is run from