Drupal 7: Have an Edit Field within a Viewed Node - forms

Question

I have a content type which is only viewable (not editable) to a certain role. I've customised the form output completely (manually outputting each field as they display in a certain way).
However there's one field I would like this user to be able to 'edit' which is a custom 'revision comment' field I've made. I can hardcode in the form fields, except of course it won't work without the token, build id etc that Drupal generates like this:
<input type="hidden" name="form_build_id" value="<?php print render($form['#build_id']); ?>">
<input type="hidden" name="form_token" value="<?php print drupal_get_token($form['#token']); ?>">
<input type="hidden" name="form_id" value="<?php print render($form['#form_id']); ?>">
So essentially I'm wondering what workaround I could use, as $form and it's variable are obviously only generated when 'editing' the node.

Answer 1

In case anyone else needs to know, I hardcoded this into the template file and it works:
<form class="node-form node-project-form" action="/dashboard" method="post" id="project-node-form" accept-charset="UTF-8">
<input type="hidden" name="nid" value="<?php print $nodeid; ?>">
<input type="hidden" name="uid" value="<?php print $user->uid; ?>">
<div id="revision-comments" style="margin:0">
<label for="log-comments">Log Message</label>
<textarea id="log-comments" name="log_comments"" cols="60" rows="4" class="form-textarea"></textarea>
</div>
<input type="submit" id="edit-submit" name="op" value="Post Comment" class="form-submit">
</form>