Hi,

You can create a custom control with below details. It is just an extension of pzGridRadioButtons.

<pega:save name="strRefName" ref="$this-name" />
<pega:save name="strValue" ref="$this-value" />

<pega:include name="Messages"/>
<%
                String output = tools.getSaveValue("strRefName").replaceAll("[\\d]" , "");
%>

<input type="hidden" name="<p:r n='$this-name'/>" value="false"/>
<input   type=radio name="<p:r n='$this-name'/>" 
onclick="setOtherRadioToFalse(this, event );"  value="true"
<pega:when test='$this-value=="true"'> 
    checked="true" id = "<%=output%>" 
</pega:when>
<pega:choose>
<pega:when test="$mode-input">
</pega:when> 
<pega:otherwise>
 disabled="disabled" 
</pega:otherwise>
</pega:choose>
 />

include below script in a JS file and add it in the harness
<script>
function setOtherRadioToFalse(Obj, event){
                  var currentName = Obj.name;
                       if(typeof(Obj.id)=="undefined" || Obj.id=="")
                                        Obj.id = currentName.replace(/[\d]/g, "");
                        var radioButtonsList = pega.util.Dom.getElementsById(Obj.id);
                        var len = radioButtonsList.length;
                        for(var i=0; i<len ; i++){
                                        if(radioButtonsList[i]){
                                                if(radioButtonsList[i].name != currentName){
                                                                radioButtonsList[i].checked = false;
                                                }
                                         }
                        }
             }
</script>

Please let me know if you find any other easy way to handle it.

Hope it helps.

Thanks,

Ananda Bhat