For those who wish to learn more the original post can be found here: http://forum.xda-developers.com/showthread.php?t=114215
New install instructions
Flash via CWM OR follow the instructions above, but you must locate the files within the zip sub folders. They are in the folders they should be in if you were to unzip to the device root. You may also copy and paste with root explorer if you prefer that to ADB (I do). Just make sure you get the file permissions right (they should match other files in the same folder).
NOTE: If you have adfree or another adblock, you'll see a message to disable it, you don't need to disable it (they just want you to watch their commercials), just wait the 30 seconds or whatever it is and that black message counts as your commercial, and your show will play
Once we get a few custom kernels out there with init.d support we won't need script manager (init.d support just means it will run all scripts in the folder /system/etc/init.d) making the process a bit cleaner but for now this works. I also have a cwm flashable version but we'll have to wait a bit longer for that. For now let's just be happy Jcase got us root Enjoy!
EDIT: Updated for ICS AND JELLYBEAN and flash version 22.214.171.124 (8/9/2012) (latest..for now) LATEST VERSION IS BUILT TO BE EASIER/MORE RELIABLE FOR SOME USERS
TESTED: Confirmed on Galaxy SII on CMX. Turns out Jelly Bean (and maybe ICS) have changed the order on boot so that init.d runs BEFORE flash overwrites our hack on each boot. In other words, the flash APK is re-unpacked in its non-hacked form by adobeflashplayer on each boot somewhere after the boot animation and probably just before the homescreen is displayed. The init.d scripts we run are unfortunately run at the VERY beginning, while the OEM logo is still displayed (BEFORE the boot animation). Because of this, script manager is currently absolutely required until I can find another "entry point" to run these scripts
It is this unfortuante order that requires using script manager to run the script "on boot" later in the process.
Be sure BUSYBOX is installed or GTFO
It IS typically included in most custom roms, but still, MAKE SURE.
HOWTO Video (without using the adb method above though it still works just fine) thanks to jjdevega if you need it here http://youtu.be/rXTdIyMP_Xs
OLD install instructions below for those without CWM:
So here goes.
1. Update flash via the market to the latest version
2. Download & unzip the 2 files linked below to be pushed to /data/flash
3. adb shell mkdir /data/flash
4. adb push S98fixflash /data/flash
5. adb push libflashplayer.so /data/flash
5.5 (almost forgot) Install Busybox from the market, let it run, grant su, and have it install the latest busybox for you
6. Install Script Manager from the market
7. Open Script Manager and be sure to select to give it root access
8. Browse to /data/flash in Script Manager, select S98fixflash and select root and boot options (thus making it run on each boot, with root permissions)
9. Reboot (Press + hold power, power off)
10. Open Browser, open settings, advanced, user agent string, desktop