What type of reflink are you meaning? I guess I don't quite understand what you mean.

Do you wan't a link like this:
http://YourDomain.com/?ref=yourusername
if so you could simply add the...

There are a lot of ways that you could do this. One way would be to use sessions to store some info.

You can use a form like this one...

<form id="theme" action="" method="post">
<p>
<select...

Maybe you should switch the script around alittle. Try the following.
<?
$pict_url = mysql_result($result, $i, "pict_url");
$pict = "uploaded/$pict_url";
$phu = intval(mysql_result(...

HI, I don't know if this will help but I have a simlar php page in my project and I get a defaul image with the if statement like this:
if(!empty($pict_url))
Try changing you if statement from
if...