This tutorial will show you how to create a link that pops up with fixed width, height, scrollbars and more.

Steps :
I know you are thinking that this involves adding javascripts to pages and more but it's quite simple. Just one line

Find your text or image that you want to link and write it like the following

<? <a a href="http://www.yoursite.com/link_to_your_pop-up_page.php" 
      onclick="window.open('http://www.yoursite.com/link_to_your_pop-up_page.php'
      ,'LINKNAME','width=500,height=400,left=0,top=0,toolbar=no,status=no,scrollbars=yes,resizable=no
      ,menubar=no,location=no');return false;">[Help?]</a>?>

The code is pretty easy to figure out. Change both links to point to the page you want to popup. Change the width and height in pixels of the new popup window and change the attributes. Play around with them to see what you get

Visit the forums for more help.