Final version released. Topic locked.
I've just posted a test release of WinSCP Portable 4.0.3. WinSCP is an SFTP, FTP and SCP client. The portable version is bundled with a launcher to handle your settings files as you move between PCs.
WinSCP Portable will also automatically work with PuTTY Portable. You just need to start PuTTY Portable independently before you click the PuTTY button within WinSCP.
Download WinSCP Portable 4.0.3 Pre-Release 2
(may take a few minutes to hit the download servers)
Please give it a try and post your feedback.
UPDATE (August 6) Pre-Release 2: The launcher has been updated to use the WinSCP command line rather than moving the INI file back and forth. Thus, the launcher doesn't have to wait around for WinSCP to finish anymore.