You can change the requirements in the web.config file.
<membership defaultProvider="myProvider" userIsOnlineTimeWindow="20">
<providers>
<add
name="myProvider"
type="System.Web.Security.SqlMembershipProvider"
connectionStringName="LocalSqlServer"
enablePasswordRetrieval="false"
enablePasswordReset="true"
requiresQuestionAndAnswer="false"
applicationName="/"
requiresUniqueEmail="false"
passwordFormat="Hashed"
maxInvalidPasswordAttempts="5"
minRequiredPasswordLength="6"
minRequiredNonalphanumericCharacters="0"
passwordAttemptWindow="10"
passwordStrengthRegularExpression=""/>
</providers>
</membership>
requiresQuestionAndAnswer="false" is the important bit for your example.
The membership provider API enables you to create users in code. eg Membership.CreateUser
You easily use this to write a small utility to import your users from a list.