It is true, the custom scripts are there but they are not codified scripts and can't be eprescribed. I customized all my scripts initailly as I didn't like how some of the scripts were mixed with lower and uppercase letters. This is how apparently they are codified. Not sure how you can get rid of these codified forms of drugs. They are the ones that work with eprescribing.
Let me know if this is all a mistake. This is my understanding. I seem to be eprescribing without difficulty now.