I have carried out a temporary fix using ReReplacer:
Serach:
<div class="hikaradios" id="data_register_registration_method">,<div class="btn-group btn-group-vertical" data-toggle="buttons-radio">,<label for="data_register_registration_methodlogin" class="btn active hikabtn-checkout-login">Login<br/></label>,<label for="data_register_registration_method0" class="btn">Registration<br/></label>,<label for="data_register_registration_method2" class="btn">Guest<br/></label>
Replace:
<div class="controls">,<div class="controls">,<label for="data[register][registration_method]login" id="data[register][registration_method]login-lbl" class="radio">
<input type="radio" name="data[register][registration_method]" id="data[register][registration_method]login" value="login" checked="checked" onchange="displayRegistration(this)">Login<br/> </label>,<label for="data[register][registration_method]0" id="data[register][registration_method]0-lbl" class="radio"><input type="radio" name="data[register][registration_method]" id="data[register][registration_method]0" value="0" onchange="displayRegistration(this)">Registration<br/> </label>,<label for="data[register][registration_method]2" id="data[register][registration_method]2-lbl" class="radio"><input type="radio" name="data[register][registration_method]" id="data[register][registration_method]2" value="2" onchange="displayRegistration(this)">Guest<br/> </label>
It would be great to know where the bootstrap design views are being added to the html output. Then maybe we could add a html overide?