Hi, not sure on PC files, but...
Invisibility Toggler - 1.1...
http://www.versiontracker.com/dyn/moreinfo/macosx/32246
InVisibles - 1.5...
http://www.versiontracker.com/dyn/moreinfo/macosx/14722
Show Hidden Files 1.0...
http://www.macupdate.com/app/mac/29096/show-hidden-files
Hidden Way is a toggle for hidden files view in Finder...
http://www.macupdate.com/app/mac/25716/hidden-way
Show hidden files in OSX Finder
Open the Terminal and type or copy/paste:
defaults write com.apple.finder AppleShowAllFiles -bool true
Reverting to the default of NOT showing hidden files:
defaults write com.apple.finder AppleShowAllFiles -bool false
*Restart or Force Quit Finder required to take effect.*
http://www.apple.com/downloads/dashboard/developer/hiddenfiles.html
http://www.burobjorn.nl/blog/?p=96
Finder Force Quit, or restart required to take effect.