Login - question about visitor registration customization

[[!Register?
    &submitVar=`registerbtn`
    &activationResourceId=`12`
    &activationEmailTpl=`myActivationEmailTpl`
    &activationEmailSubject=`Thanks for Registering!`
    &submittedResourceId=`45`
    &usergroups=`customers`
]]

<input type="submit" name="registerbtn" value="Register" />

<h2>Register</h2>
 
[[!Register?
    &submitVar=`registerbtn`
    &activationResourceId=`12`
    &activationEmailTpl=`myActivationEmailTpl`
    &activationEmailSubject=`Thanks for Registering!`
    &submittedResourceId=`23`
    &usergroups=`customers`
]]
 
<div class="register">
    <div class="registerMessage">[[+error.message]]</div><br>
*Required Fields
  
<form class="form" action="[[~[[*id]]]]" method="post">
        <input type="hidden" name="nospam:blank" value="" />
        <br>
        <label for="username">*[[%register.username? &namespace=`login` &topic=`register`]]
            <span class="error">[[+error.username]]</span>
        </label>
        <br>
        <input type="text" name="username:required:minLength=6" id="username" value="[[+username]]" />
         
<label for="password"><br>
        *[[%register.password]]
            <span class="error">[[+error.password]]</span>        </label>
        <br>
        <input type="password" name="password:required:minLength=6" id="password" value="[[+password]]" />
         
<label for="password_confirm"><br>
        *[[%register.password_confirm]]
            <span class="error">[[+error.password_confirm]]</span>        </label>
        <br>
        <input type="password" name="password_confirm:password_confirm=`password`" id="password_confirm" value="[[+password_confirm]]" />
         
        <label for="fullname"><br>
        *[[%register.fullname]]
            <span class="error">[[+error.fullname]]</span> </label>
        <br>
        <input type="text" name="fullname:required" id="fullname" value="[[+fullname]]" />
        <br>
        <label for="email">*[[%register.email]]
            <span class="error">[[+error.email]]</span>
        </label>
        <br>
        <input type="text" name="email:email" id="email" value="[[+email]]" />
        <br>
		<label>*Phone#: <span class="error">[[+error.phone]]</span> <br>
		<input type="text" name="phone:required" value="[[+phone]]" /></label>
        <br>
        <label>Alt. Phone#: <span class="error">[[+error.alt_phone]]</span> <br>
		<input type="text" name="alt_phone" value="[[+alt_phone]]" /></label>
        <br>
        <label>Business: <span class="error">[[+error.business]]</span> <br>
		<input type="text" name="business" value="[[+business]]" /></label>
        <br>
    <label>Would you like to receive promotions on special deals? <span class="error">[[+error.notifications]]</span> <br>
    <select name="color">
   <option value="yes" [[!+fi.color:FormItIsSelected=`yes`]] >Yes</option>
   <option value="no" [[!+fi.color:FormItIsSelected=`no`]] >No</option>
</select></label>
<br>

<input name="address" type="hidden" value="[[+address]]" />
<input name="credit_card" type="hidden" value="[[+credit_card]]" />
<input name="Billing_address" type="hidden" value="[[+billing_address]]" />
<input name="card_type" type="hidden" value="[[+card_type]]" />
<input name="card_number:blank" type="hidden" value="[[+card_number]]" />
<input name="ccv" type="hidden" value="none" />
<input name="expiration_date" type="hidden" value="[[+expiration]]" />
<input name="product:blank" type="hidden" value="[[+product]]" />
<input name="reference_number" type="hidden" value="[[+reference_number]]" />
<input name="represenative" type="hidden" value="[[+representative]]" />

<br>

<br class="clear" />
         
        <div class="form-buttons">
            <input type="submit" name="registerbtn" value="Register" />
        </div>
  </form>
</div>

<p>[[+fullname]],</p>
 
<p>Thanks for registering! To activate your new account, please click on the following link:</p>
 
<p><a href="[[+confirmUrl]]">[[+confirmUrl]]</a></p>
 
<p>After activating, you may login with your password and username:</p>
 
<p>
Username: <strong>[[+username]]</strong><br />
Password: <strong>[[+password]]</strong></p>

[[!Register? &submitVar=`registerbtn` &activation=`0` &usergroups=`customers` &submittedResourceId=`23` ]] 

[[!Login? &loginResourceId='13' &successMsg= 'You are now logged in' &logoutResourceId='1']]  

[[!Login? &loginResourceId=`13` &successMsg= `You are now logged in` &logoutResourceId=`1`]]