[vBNinja]

in that case the easiest way to go about it is edit your register template and add the input fields, give them specific names or maybe put all of them related to your application in an array like:
<input type="text" name="myapplication[question1]" />
<textarea rows="4" cols="50" name="myapplication[question2]"></textarea>
etc...

then edit the plugins ozzy used to post the welcome threads and catch the data for your application fields like:

PHP Code:

$myapplication = $vbulletin->input->clean_gpc('p', 'myapplication', TYPE_ARRAY); 


$myapplication will then be an array holding all the data you need and its keys are the same as what you gave your input fields
ex. $myapplication['question1'] would have the data for question 1

I would then create a new template to format your application and register the $myapplication array to it so you can use the fields data in it such as {vb:raw myapplication.question1}

if you're confused, it would looks something like:

PHP Code:

$app_templater = vB_Template::create('application_format');
$app_templater->register('myapplication', $myapplication);
$threaddm->do_set('pagetext', $app_templater->render(true));