Grab data WHERE table.ID NOT LIKE otherTable.ID

Here is my SQL;

"SELECT Registration.CustomerID, Customer.CustomerID AS CustID, Firstname,
Lastname, Username, Password, Question, Answer, Email, Age, Gender, Address,
City, State, Zip FROM Customer, Registration WHERE Customer.CustomerID NOT
LIKE Registration.CustomerID"

I'm trying to return all the records from Customer that have not registered
in Registration, so the psuedo sql would read;

Return everything from all fields in Customer where the ID is NOT in the
Registration table. Any ideas?

Thanks,

Mark