I am using flash on dCore, importing iceweasel, firefox, midori, or chromium should bring in the necessary deps. If you want flash, just download the tarball:
http://get.adobe.com/flashplayer/download/?installer=Flash_Player_11.2_for_other_Linux_(.tar.gz)_32-bit&standalone=1untar the tarball:
tar xvf install_flash_player_11_linux.i386.tar.gz
copy the library to /usr/lib/mozilla/plugins:
mkdir -p /usr/lib/mozilla/plugins
cp libflashplayer.so /usr/lib/mozilla/plugins/
Add the path usr/lib/mozilla/plugins to your /opt/.filetool.lst file and do a backup.
I will double check the dependencies of the browsers besides firefox/seamonkey tonight to make sure they will work with flash out of the box.