I think I get what you're trying to do.
To make this a little simpler, the page your trying to access is "index.php", from your page "grab.php". (assuming they are in the same directory)
sorta code in grab.php:
$filename = "index.php;
$fp = fopen($filename, "r");
$contents = fread($fp, "10000");
fclose($fp);
The "10000" just keeps your server from trying to open a very large file. Set it as high as you want.
You'd simply use a regular expression to get the content you wanted from $contents, then you can insert it into your PHP page however you'd like to.
You'll probably want to assign the product of the regex you use (like eregi) to a variable, and just use that variable in your "content" area in the place you want it.
(I hope this all made sense)
