How do I check this box as default? (PHP Help) [Completed]

[akz645]

1)
Template: modifyprofile

PHP Code:

<div class="blockrow">
                <ul class="checkradio group">
                    <li>
<label for="repdisplay">{vb:rawphrase repdisplay}:</label>
<select class="primary" name="userfield[field7]" id="cfield_7" tabindex="1">
<option value="1" checked="checked">Yes</option>
<option value="0"></option>
</select>
<input type="hidden" name="userfield[field7_set]" value="1" />
                    </li>
                </ul>
            </div> 


Note: I'm not sure if the ul class is even correct. Profile field type: Multiple-Selection Checkbox -> I guessed the ul class for that to be checkradio group.
http://i.imgur.com/ebV531x.png
The current default = Whatever is currently being used. So if I ticked the box and then went to see my post, then I came back to Edit Profile, the box would remain ticked.
I'm not sure how to change that default.
How do I make it so everytime someone visits 'Edit Profile' the checkbox will always have yes ticked, instead of it defaulted to whatever the user currently had saved it as?


2) Profile Field
http://i.imgur.com/Gm0cTIn.png -> No, but show at registration makes it appear, as a checkbox.
This is what appears at the bottom, when users are registering:

However, the box is unticked. How do I have it ticked by default?

This is the Mod (I made) that it will help:
https://vborg.vbsupport.ru/showthread.php?p=2552624