This is the guide I followed:
It provides download links for mediafire.com and other UNOFFICIAL download sites. These are NOT guaranteed to be unhacked versions. Downloading files from sites OTHER THAN the author site IS "hackish".
Because side loading requires changing a security setting to allow installing "non-appMarket apps", AND because you get a big warning about this being a security risk, for many people, bypassing security and the big scary warning message ARE "hackish".
It is adobe flash 18.104.22.168 and dolphin browser HD 8.5.1. I have been using these for two weeks now. This is not the latest version of flash (Version 22.214.171.124) which was released 2012 Aug 5. In fact, it is 7 versions old.
It does work at many sites (even in the chrome browser), but not all. Some sites still say I need to install the latest flash browser.
You said 2012 Aug 10 that you are running the "latest 11.1", but exactly which of the 8 released versions of 11.1 are you running? When I tried a newer one, it refused to install, so I had to go back to an older version as shown at xda-developers.
So, how can relaxing security settings AND bypassing warning messages AND downloading from unofficial sites NOT be considered "hackish"?