Can you find the archive that contained the FSPort .vp, and use your archive managment program to test it? WinZip, WinRAR, and 7-Zip support this. Usually it's Action -> Test Archive, Tools -> Test, or in Windows Explorer, right-click on the archive, go down to WinRAR, WinZip, or 7-Zip, and hit "Test". If you can't find it, let me know, I'll post pictures / instructions. Do you have any of these archive programs?