1) http://macromedia.mplug.org/
Get the flash-plugin RPM from here, or add the apt or yum sources to your package management tool configuration.
http://videl.ics.hawaii.edu/pipermail/linuxflash/2003-November/000087.html
Read this announcement in order to test the newer flash-plugin package. Same plugin binary, but it installs a bit smoother for some users especially if you have MozillaFirebird from fedora.us or Dag's repository.
2) FC1 requires that you install compat-libstdc++ in order for the flash plugin to function. This is true of both installing the plugin manually or installing the flash-plugin package.