Note that a simple alias only works for root, for example when you ssh into the device.

I actually found that tweakflashver is (so far) enough for almost all of my purposes (google streetview I use through an Easy Debian app to which I pointed somewhere above in this thread).

EDIT: After some failed attempts, I managed to set up shortcuts where I don't need ssh to get root: Provided rootsh is installed, adding the following lines to /home/user/.profile
allows one to just say "flash10" or "flash9" in XTerminal to activate the respective flashplayer. One should of course stop and restart the browser when doing so.