You don't need to make a package of Adobe Flash. Just rename the old Flash plugin in /usr/lib/mozilla/plugins, expand install_flash_player_10_linux.tar.gz, and copy the new libflashplayer.so to /usr/lib/mozilla/plugins and make it executable. Firefox, SeaMonkey, and Opera all look there for the Flash plugin.
A few weeks ago Flash stopped working in Opera on my VL6 Deluxe partition. I tried everything to fix it, including a complete removal of Opera and Flash and reinstallation from Gslapt. I also tried copying files from VL6 partitions where Flash was working with Opera. Nothing helped.
I finally decided the best course was a reinstallation of VL6 Deluxe from scratch (after backing up my home directory). Flash was working. I updated both Opera and Flash and they are still working.
I have no idea what went wrong the first time. Flash continued to work with SeaMonkey and Firefox. Only Opera had the problem. Reinstalling was my best option--easier than trying to track down what was wrong (especially since I had tried just about every fix and they didn't work).