How can I replace our store name with the customer's name in the "From" field when we receive new order emails? Makes more sense for us to see an order coming from a customer rather than our store name each time. Thanks.
Since the email you get is a BCC (email copy) of what is sent to the customer editing the code would result in the customer seeing his own name in the order mail.
However in case you might want to change it. Check the class
sendNewOrderEmail. On line
1329 you will see the following code.
This is where the sender of the email is set.