You are correct in assuming that Liquid Metal bins cannot be flashed onto Liquid A1/Liquid E.
The way it is organized is that the newer bins are on the bottom. The smartest thing to do is to flash the newest bin you possibly can as they are the least buggy (some of these were leaks released prior to official releases). These bins are flashed by following this guide- http://android.modac...-acer-liquid-e/
and if anything goes wrong, refer to this thread- http://android.modac...-please-sticky/
If you are flashing a .bin file, the region does not matter.
AAP=Asia/Asia Pacific. It has English along with 2 types of Chinese (traditional & han)
EMEA=Europe/Middle East/Australia. It has many English along with many European languages.
ROG/FIDO=Rogers or Fido. Canadian carriers. DO NOT FLASH ANY .BIN BY ROGERS OR FIDO OR ELSE IT WILL SIMLOCK YOUR PHONE TO CANADA.
After EMEA or AAP, you will see a 4 character code (ie GEN1/GEN2/CUS1/bla bla bla), this specifies a region within a region. Again when flashing using the Acer Download Tool, the region does not matter.
However, since you are purchasing a Liquid E, you could download the FroYo update directly from the Acer website (no need to flash the bin using the download tool)- http://global-downlo...amp;Category=OS
(to update to FroYo through Acer's method, region DOES matter. Both EMEA/AAP as well as the 4 character code, I think. This information can be found in Settings-->About Phone-->Build Number. Better way would be to go to the Acer Support website for your country and find it under Downloads).
Edited by HustlinDaily, 16 January 2011 - 08:09 AM.