i bought mine on ebay and after reading on amazon reviews some dude that flashed the ROAM 2 FW to the ROAM, i decided to try it, and it works awesome but i did got a scare after the flashing the camera wouldnt record and gave me a memory error (keeps beeping and flashing) turned out after flashing the FW you need to format the micro sd xD
Myth confirmed! On my camera it worked exactly as you described. Put firmware on the card (root folder), renamed the file, changed UPGRADE_FW to Y, status button, format, works.
Just did a little test vid in 60 FPS and it's all good!
Now I get all the newer firmware features without losing my beloved 60 fps.
Dude you should be an honorary lifetime member!