There are many methods to creating an English bank.
This method was created by ChezzieChan and comes in both lite and full versions.
The lite list only covers the basic consonants, vowels, and vowel-consonants, while the full version covers enough to make the bank sing English with ease. Which list you want to use depends on how much you want to record.
The lite list is downloadable here and contains 140 stringed samples. (Please note that the owner has taken the list down)
The full list is downloadable here and contains 537 samples for the stringed version, or 885 unstringed samples.
This method has been used by many users, most notably Prince Syo.
Syo's CVC method uses X-SAMPA and is recorded similar to CV, with VC ending in a seperate folder. The beta version of this list and voicebank can be found here .
This method is the simplest, though most time-consuming. Most people make lists according to what they think they need. One such list can be found here .