I am using Debian Lenny xfce, and when on Facebook, certain applications I use on there require a flash upgrade. I can download the package for the upgrade, but there is no installer for it. I am asked what to open it with, but there is no viable option in the drop down list. I have searched the Debian repositories for the latest flash player, but so far I have been unable to find one. I'm new to Debian, and I am a little lost. I know in Mint there is a deb package installer, as well as Ubuntu, and others, but I can't find one here. Any help a newbi can easily understand will be appreciated. Thanks, in advance.

Try adding Debian multimedia to your /etc/apt/sources.list. Then update your package list and install flashplayer-mozilla. (Oh, and don't forget to install the gpg key for apt).

I already have the Debian multimedia source in my list, but how do I install this gpg key, or for that matter even find it?

There's a package for the key, called debian-multimedia-keyring, that you can install (via either synaptic or aptitude). Either flashplayer-mozilla or flashplugin-nonfree should work. If you already have one of these packages installed, then, to get the latest flashplayer, try the following in your terminal (as either root, or, if you use sudo, then preceded by "sudo"):

or, if it's flashplayer-mozilla that you've got, then do "dpkg-reconfigure flashplayer-mozilla". I myself have flashplugin-nonfree, which works.

I got the ketring with no problems, and did as you suggested, but it says I have the latest version of flashplayer, but FaceBook still is asking for an update. Oh well, I guess Ill have to stick with what works, and do Mint for my browsing. Thanks for the try any ways.