Password Protecting Specific Folders?

[5|*42]

You could either change the permissions so only the admin can view the files, or you could encrypt the files (Right-click the folder and click Properties, the go to the advanced tab, then choose Check "Encrypt contents to secure data" option). If you want something else tho, here are a few good programs that would also work:
AxCrypt
Folder Guard
WinCry