These are both their own systems. The Ghostbusters game uses the Ghostbuster International rules from West End Games published in 1989. Privateers and Gentlemen uses the original rules for Privateers and Gentlemen from Fantasy Games Unlimited, which was originally published in 1983 but is still available as a pdf (I think).
I write reviews for Knights of the Dinner Table Magazine and like to try a game out before I review it, so I draft some of my friends and get them to play the games I run. Once Ross gets back from China, I'll be sending in audio for Ringworld, 2300 AD, Aliens, Behind Enemy Lines, Bureau 13, Expendables, Megatraveller, Metamorphosis Alpha, Paranoia, Star Frontiers, Stormbringer, Time Lord, Top Secret, Bughunters, Traveller New Era, and Weird Wars (the original d20 version). These will all be one-shots. I also have a couple of Delta Green sessions (Puppet Shows and Shadow Plays) and am presently running a Call of Cthulhu campaign that I have audio for. That latter has had two sessions of Edge of Darkness and (so far) two sessions of an adaption of Silent Hill II to Call of Cthulhu.
There are also a few Call of Cthulhu convention games I've run. They might find their way here eventually (unless I've so driven Ross crazy with uploads that he bans me by then).
I'm hoping to upload about once a week.