Hello,
You should be able to import the photos from the iPhone to your PC. You may need to use the Scanner & Camera Wizard to get the photos to the PC, then copy them to the flash drive.
-How does the PC see the iPhone - in iTunes?
-What version of iTunes is on the PC?
-Were the photos you are trying to copy from the iPhone taken with the iPhone (Camera Roll) camera, or synced from another computer?
C