I've just posted a test release of WinSCP Portable 4.0.3. It's WinSCP packaged in PortableApps.com Format so that it automatically integrates with the PortableApps.com Suite
and works from any portable device (USB flash drive, iPod, portable hard drive, etc). It will automatically work with PuTTY Portable
(just start PuTTY Portable before clicking the PuTTY button within WinSCP).
For more information and to download the test release visit: WinSCP Portable 4.0.3 Pre-Release 1 (Testers Needed)