Custom Block or Moduel

[Smash]

How do I make A custom Block that opens in the middle of the page showing another webpage that will show in the middle of the block

Please note not a link but a webpage

so if I wanted this php forum page "www.php-forum.com" to show up in a block in the middle of my the php nuke when i click on a link to it in my site index

so you will understand what Im say in the same way phpbb port works...
I have a gaming ladder that opens up in a different window i would like it to open in a block in the php nuke5.5 page

[WiZARD]

http://www.php-forum.com/p/viewtopic.php?p=5835#5835