Hey guys...Awesome product. Definitely the easiest to setup.
I'm glad to hear that.
My Question: I want to require my users to enter an email address along with a serial number in order to register.
This is typically done at the time you create the product keys. For instance, you might have an order form where they enter their name, email, and credit card details. After the CC has been successfully charged you generate a product key (using limelm.pkey.generate or manually within LimeLM) set the email & number of activations, and then email this product key to the user.
In other words, you only have to ask for the email once: when you're generating the product key. Does that make sense?