Set Customer F7 Issues

I'm trying to setup customer id cards The cards would have a bar code and cashier would scan them. I have two problems i'm running into.

1. When cashier presses F7 and scans the card unless the focus is on "ACCOUNT" the software can select wrong customer. Also if the a item bar code is scanned or a wrong card is scanned t will select some account instead of prompting the cashier . The focus can be changed if manual customer look up by name is used . Is there a way to prompt the cashier if the customers card( customer number) is not found.

Is there a way to block cashiers from using manual look up?

2 Is there a way to create a customer card that the cashier would only have to scan, and not have to press F7 to set customer ?

Thanks for any help

Robert, If you find the solutions that Jeff posted are not working consistenly enough for you, we also have a program called Express Customer Setup that, among other things, can take a swipe from a loyalty card at the beginning of a transaction and set the customer for you. If you are interested in learning more, please drop me an email.